Magical Triangle - Think Outside The Box!
Рет қаралды 1,856,950
3 жыл бұрынMany people requested this one. It was asked to 9th grade students in India who had only learned geometry, so you are supposed to solve it without using trigonometry. I thank Anand Gautam for discovering the incredible solution!
Polish translation credit: Tłumaczenie: Przemyslav
Znajdź mnie tutaj: forum.cdaction.pl/blogs/blog/...
You can also solve the problem with trigonometry. This post does so for the 2nd part of the question:
brainly.in/question/16749924
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@cristiluchian3567 3 жыл бұрын
Presh : 1+1=2 Me : ok , i got that one
@pratyushsingh1211 3 жыл бұрын
well atleast you got that
@saket174 3 жыл бұрын
Blackpenredpen 😂😂😂
@Daniel_WR_Hart 3 жыл бұрын
Not gonna lie I had a relative once ask me if x + x = 2x, I said yes then he started arguing about it with my cousin lol
@vol230 3 жыл бұрын
@@Daniel_WR_Hart ROFL
@Daniel_WR_Hart 3 жыл бұрын
@@vol230 I wish I was trolling but unfortunately I'm not
@chl4327 3 жыл бұрын
I cannot believe that I’m watching this to entertain myself.
@jakehosten3239 3 жыл бұрын
Good you developed your self and you improved your level in maths
@nobodyknows1106 3 жыл бұрын
But My Answer is Coming 70°(the asked one) and other one is coming (45+70)=115,180-115= 65°,please help!
@rishabh645 3 жыл бұрын
same here,each time i open youtube and i see one video from this channel
@henriquevianna6875 3 жыл бұрын
May I ask why?
@smaranaggarwal5154 3 жыл бұрын
me 2...thot i see math 1 last time b4 i die due to kidney failure @16 :) ...bye world♥
@obowonkonobo 3 жыл бұрын
Me: *solves the problem looking at the thumbnail using trig* You: "the challenge is to do it without trig" Me: 😲
@nijoeli 3 жыл бұрын
Same hahaha
@minakumari7949 3 жыл бұрын
Me too
@deadble5k 3 жыл бұрын
I don't even know what trigonometry is. Can someone tell me what it is?
@taowang9735 3 жыл бұрын
@@deadble5k start with sin, cos, tan, etc and then learn how to manipulate it like algebra
@donthavelove42 3 жыл бұрын
Ikr, his solve is cool and all, but how to solve it pure mathematics
@blackhole4813 3 жыл бұрын
These videos* make me question whether I really deserve to be in college.
@salmanel-farsi3744 3 жыл бұрын
I hope you are joking. You understood the proof presented - that is vital in my opinion vs getting the ah ha momoment which can often be *not* so trivial
@MarvKage 3 жыл бұрын
My friend, you and I are the same
@leif1075 3 жыл бұрын
@@salmanel-farsi3744 if it is not sp trivial that means it's also important so aren't you contradicting yourself?
@salmanel-farsi3744 3 жыл бұрын
@@leif1075 Thanks for highlighting the possible confusion. My point was to celebrate the understanding of the proof even if one could not arrive at the proof themselves. I will go back to adjust the wording..
@leif1075 3 жыл бұрын
@@salmanel-farsi3744 Thanks but I need to be someone who arrives at the proof themselves or comes up withba different proof..I don't want to be unexceptional..recognizing the proof or understanding it doesn't require nearly as much ability.
@carcaperu4041 3 жыл бұрын
"Nothing out of the box is good, trust me" Pandora
@user-sf4zu2dy3z 3 жыл бұрын
That made my day🤣🤣😂
@asktnegi5723 3 жыл бұрын
Presh should give this comment a heart.
@theobolt250 3 жыл бұрын
@Cara Peru. I always love being inside the box. 😜
@PhilemonXIV 3 жыл бұрын
Classic!!! 🔥💯😆
@arunavabhar2170 2 жыл бұрын
Schrodinger approves too
@photocopi 3 жыл бұрын
I've always found those problems so cool! Just rotating a triangle was the key, and I would never think about it until you showed us. Great job Presh!
@leif1075 3 жыл бұрын
Dont you find it annoying and frustrating and insulting?
@goodplacetostart9099 3 жыл бұрын
Ahaa photocoPI
@photocopi 3 жыл бұрын
sumakit cjs well, in french π is prononced like "pee" so my username works better
@Tiqerboy 3 жыл бұрын
I eventually realized you had to do it if you wanted a non trig solution to this problem but I wouldn't have satisfied the time constraints of a traditional math test. That is why trig was invented. To save time and eliminate the need to come up with tricks.
@hafez591 3 жыл бұрын
It took me a couple of days jumping from one way to another until finally could jump out of the box
@JaredOwen 3 жыл бұрын
Oh dang - that was intense!
@ankitmeena6842 3 жыл бұрын
Just another jee problem 😪
@NamVu-im2xm 3 жыл бұрын
3D god is watching 2D thing lmao
@adwaitT 3 жыл бұрын
@@NamVu-im2xm lol
@Sunfish789 3 жыл бұрын
How are you here?
@nobodyknows1106 3 жыл бұрын
But My Answer is Coming 70°(the asked one) and other one is coming (45+70)=115,180-115= 65°,please help!
@ashwinidasanchal4402 3 жыл бұрын
3:37 🤯🤯🤯🤯🤯 being an Indian student that amazed me
@sat31415 3 жыл бұрын
Yes because race determines your reactions.
@ashwinidasanchal4402 3 жыл бұрын
@@sat31415 no way , you got that wrong , as a student in Indian education system it's quite difficult to find someone who looks upon such questions and problems and I was amazed just because of the beauty of the question , I hope that you got my point ..
@Dev_1907 2 жыл бұрын
Why you have to mention "Indian " ??
@studytimevibes3206 2 жыл бұрын
@@Dev_1907 cuz this que is frm an indian 9th grade que paper
@astitva3072 2 жыл бұрын
@@sat31415 they said that because the question was from the main course maths book for 9th graders in India
@bluechicken4866 3 жыл бұрын
I always love "Out Of The Box" thinking like this. Thanks again Presh!
@tjejojyj 3 жыл бұрын
Hmmm. Sure it was an “out of the square” solution. 😜
@jonathanwood8847 3 жыл бұрын
I can't stand them. They always seem completely arbitrary
@arunamankar 3 жыл бұрын
@@tjejojyj 😂 AMAZING BRO !! 😀👍🏻😂
@nobodyknows1106 3 жыл бұрын
But My Answer is Coming 70°(the asked one) and other one is coming (45+70)=115,180-115= 65°,please help!
@vaughnjohnson8767 3 жыл бұрын
The first part was real easy. 45 and 70 degrees part of the triangle has to equal 180 degrees. So the missing part must be 65. I didn’t exactly understand what the second part needed me to do so I just watched it after. Took me about 5 minutes tops
@lifeofphyraprun7601 3 жыл бұрын
I actually thought about rotation and solved the first part.I was too lazy for the second part.But the point I wanna make is that due to your videos,Presh,I was able to get better at geometry quite a bit,and also in Math problem solving in general.I wanna thank you for that.My creativity also actually increased.Please keep coming up with such good Math videos.
@fedryfirman.a5783 3 жыл бұрын
Beautiful. The problem, the explanation, and everything this channel brings is pure amazing
@ajourneytoabeautifulparadi2026 3 жыл бұрын
I have just came across this channel and I am so glad about it And I definitely became the constant member of it :)
@elyn1391 3 жыл бұрын
Dayummmmm....Why i'm not find your channel early?... I just want to entertain myself with this something useful rather than a meme video or drama that wasting my time a lot while quarantine 😭😭😭
@avikdas4055 3 жыл бұрын
Surprised that the solution doesn't involve the gougu theorem.
@chhabisarkar9057 3 жыл бұрын
Lmao
@nutsbeta1325 3 жыл бұрын
what
@yfliu592 3 жыл бұрын
Vszk 010 Pythagorean Theron is known as gougu theorem among mandarin speaking countries.
@paradox5468 3 жыл бұрын
Use hua
@saetainlatin 3 жыл бұрын
This channel should be renamed as the Gougu theorem channel
@ashyniles8991 3 жыл бұрын
The first time coming across ur videos I have started liking maths.you really have comprehensive explanations.THANK YOU.
@ankitroy6915 3 жыл бұрын
I really love this channel as it shows 'out of the box thinking'.It feels cool to do so.
@charlesdang2557 3 жыл бұрын
Nice puzzle. I was content to solve this using brute force and was surprised to find whole number answers. This of course meant there was a more elegant solution. Thanks for showing the reflection trick. Immediately this brings to mind folding tricks, origami as one. if we fold the two flaps on either side, they would fit neatly within the larger triangle in the middle. Super neat!
@mohabatkhanmalak1161 3 жыл бұрын
Very interesting, I love Geometry and this is my edutainment. Thank you.
@phuongcasso42 3 жыл бұрын
Watching your last videos enables me to solve this problem on my own! Thanks Presh!
@md.abdulawalkhan3702 3 жыл бұрын
Amazing solution!!!!!!! That's why I love this channel very much.
@thenegotiator5471 3 жыл бұрын
I’ve been watching you channel for a long time that i am able now to every problem you upload. It feels amazing when you say did you figure it out and the answer is yes :)
@milan3066 3 жыл бұрын
Ah yes, the negotiator
@harshalgunjal5749 3 жыл бұрын
Love from Mumbai, India.🇮🇳🇮🇳🇮🇳🇮🇳 Love your videos, "Mind your decisions".
@user-qy8re3yx3d 2 жыл бұрын
Спасибо, Мастер! Благодаря Вам я увидела большие пробелы в своём образовании и в характере. Особенно много мне дали Ваши задачи по геометрии. Я восхищаюсь Вами!
@kingcrimson1631 2 жыл бұрын
I couldn't solve this one, I tried the linear system of equations but it was singular. However, having watched this, I feel that I now have learned a trick that might help me solve problems in the future. Thanks so much for this wonderful channel!
@pointless6781 3 жыл бұрын
Also we can find the angle by folding ADE and ABF when we draw the height of AEF
@anyone6830 3 жыл бұрын
I thought ur previous problems r simple but this one is truly some big brain stuff!!
@atmosphere6796 2 жыл бұрын
Good thing i stumbled upon this channel by chance. This is a good brain exercise. Looking forward to more math problems.
@pgbollwerk 2 жыл бұрын
I'm impressed with myself that I actually understood this one from start to finish.
@asapmath9329 3 жыл бұрын
We are inspired by you. Thanks for motivating us to do math videos 😌💝
@wiellnyan 3 жыл бұрын
When you know how to do the first part but the second part is a struggle.
@johnscarceforpresident1647 3 жыл бұрын
yo sameee
@muntasirrahman4846 3 жыл бұрын
Second part is more interesting😜😜
@arjunchawla2248 3 жыл бұрын
I found the second part easier for some reason
@Bibibosh 3 жыл бұрын
When you wipe you bum then have to wipe your hand after. Don't ask!
@upsilanmitstrima9878 3 жыл бұрын
Nah its 1+1 I am joking obviously
@asrarahmad8210 2 жыл бұрын
I love your learning mindset that great people never stop learning.
@ascaniuspotterhead2484 3 жыл бұрын
I’d have chosen a brute force method and simply made equations over equations and then slowly eliminating the unknown parts till I can solve it. But your way is much faster and easier. Thank you for making this awesome content.
@mohammadahmednooruddin5990 7 ай бұрын
I tried this but I was only got x+y=135 over and over again (where x is angle AEF and y is angle AFE)
@marcushendriksen8415 3 жыл бұрын
I clicked the video thinking that I'd have to hear all about the Gougu theorem. Imagine my pleasant surprise when I didn't.
@chhabisarkar9057 3 жыл бұрын
Love from india presh sir .. one thing I want to tell you that for your such amazing geometry videos i am able to improve my geometry to a great extent . ❤️ Btw i solved the problem using trigonometry and my answer came approximately ≈ 64.743 ≈ 65 . (Reason is because the values which the calculator gave was approximated ) but TBH your solution about rotating the triangle was great 👍 . Came to learn a new thing form you , thanks 😀
@paradox5468 3 жыл бұрын
It can be also done by similarity and in most of the square triangle question rotating the triangle is clue:-)
@paradox5468 3 жыл бұрын
We can also generalize it by taking angle theta instead of 45 degrees
@siddharthabhattacharya391 3 жыл бұрын
@CHABBI SARKAR PJ Sir ka Bhakt
@IS-py3dk 3 жыл бұрын
Really I cant live without Presh Sir
@paradox5468 3 жыл бұрын
@@siddharthabhattacharya391 kon
@echo10es 3 жыл бұрын
This is crazy! This is about depth of mind. and very impressive. Thank you☄
@fabriciolopes6007 2 жыл бұрын
There is another elegant way to do this question, this was the way i did this question when it first came to me: My solution is about to prove that this EF segment defined by a 45° in the square is aways tangent to the quarter of circunference with unity radious and center in A. To do this take the quarter of circunference and trace a tangent segment of it, now with the intersection point "P" trace AP and look that the pairs of triangles ADE, APE and ABF,APF are congruents by the Side Side Angle case (SSA - common sides, unity side and straight angle). With it, see the congruence between DAE, PAE and PAF, BAP angles, nevertheless how DAE+PAE+PAF+BAP=90° and DAE=PAE, PAF=BAP, then PAE+PAF=45°, proving that EAF will aways be 45°. So, we can guarantee that if we pass a quarter circunference in the problem with radious 1 and center A it will tangent EF. Doing this, let the intersection be an X point, now observe the AXF and ABF triangles - they are congruent by the same case before - and see that AFB and AFX(AFX=AFE) angles are both 70°, letting angle AEF= 65°(AFE+FEA+EAF=180° - EAF=45°, AFE=70°). (:
@lilac2698 2 жыл бұрын
As a ninth grader in India, I'll admit that I was unable to solve this one, but I was able to understand exactly how you reached the conclusions. I just didn't think about rotation. Thanks for sharing this problem, we have tons of questions like these in our book since almost half our chapters in the book are geometry this year (Quadrilaterals, Triangles, Lines and Angles, Circles, etc).
@stupidstuart6478 Жыл бұрын
This one must be of RD
@gvedk 7 ай бұрын
yeah it must be @@stupidstuart6478
@xz1891 3 жыл бұрын
Presh's way ("half angle" model) is good, I just want to show alternative, which is good too. Draw FH perpendicular to AE and meet @ H, thus A,B,F,H and E,C,F,H are co-circular (concyclic), respectively. So ∠HBF=∠HAF=45° (circumferential angle), so BH must be the diagonal of ABCD; connect DH (which must be diagonal), so ∆ADH congruent to ∆CDH, thus ∠DAH=∠DCH=90-45-20=25°, hence, ∠HFE =25° too, bcz it's circumferential angle, so we get ∠AEF=90-25=65° As for second part of the problem, we can use Gougu theorems and similar triangles (∆ADE and ∆FHE) to get answer, that's 2 (for you guys to do 😁).
@ujjwalnarayan07 3 жыл бұрын
Dude I have two doubts First is that what you mean by co circular Do you mean concyclic??? And second is that gougou is pythagoras theorem??
@20.nguyenvongockhue80 3 жыл бұрын
iam asian
@xz1891 3 жыл бұрын
@@ujjwalnarayan07 1, by that it means the four pts are at same circle. 2, yes, Gougu = Pythagorean
@creativejapanese 3 жыл бұрын
This is so cool! Thank you for sharing!
@gauravpandey3853 3 жыл бұрын
I am totally surprised☺ to subscribe a person like me. Sir, you are playing a vital role in transforming the education in simple and convenient way. Will gift your books to students on their b'day ☺.
@charlesbromberick4247 3 жыл бұрын
Your "rotations" are always beyond the access of my imagination. Nice problem and solution.
@leif1075 3 жыл бұрын
Doesn't that make you feel bad?
@canonicalensemble8727 3 жыл бұрын
Never thought I’d encounter this problem again lmao we had it in year 8 math in China
@shivamshankar2683 3 жыл бұрын
The first video I fully understand, thank you!
@freeminitv121 3 жыл бұрын
That's awesome I loved the way you figure it out......
@vaibhavgt0 3 жыл бұрын
Thinking “Out Of The Box” is something that I should apply in geometry too. Never thought Congruency will be used. Love from Haridwar (India)❤️
@canaryfishcat 3 жыл бұрын
Now I know I can't pass grade 9 in India. Thanks! :)
@Anish-Kumar-Verma 3 жыл бұрын
Its not bro i m indian i m in 10th It was just a miscellaneous question
@theUnmeshraj 3 жыл бұрын
@@Anish-Kumar-Verma bruh if you're weak in studies Dont actually defame us... I am studying for IMO from grade 7 and we used to get such questions.
@Anish-Kumar-Verma 3 жыл бұрын
@@theUnmeshraj if u r overintelligent dont pop yr ass
@Anish-Kumar-Verma 3 жыл бұрын
@@theUnmeshraj btw. Best of luck Hoping under 1k rank in jee. Its not in sarcastic way. Imo atudents are really worth it.
@kaos7012 3 жыл бұрын
@@theUnmeshraj Dude being able to answer this question isn't even a flex lol. A waste of time not to use trig, but I didn't and still got the answer. This question proves nothing about intelligence.
@puspamadak 3 жыл бұрын
👌. I haven't even thought of such a solution like this. Thanks for sharing this problem.
@Sjejdbangdw 3 жыл бұрын
Great question and explanation!
@fabianosemsobrenome2513 3 жыл бұрын
Just found another way! By drawing two circles with radii DE and BF, in vertices E and F, respectively. Ultimately finding the altitude of triangle AEF. The rest is pretty straightforward.
@ujjwalnarayan07 3 жыл бұрын
Ya
@lanjiaojiaozhu2745 3 жыл бұрын
How do the two circles solve the first part (i have not even got to second part)
@nanawartana5210 3 жыл бұрын
Amazing from indonesia🇮🇩
@studyzoneofficial2011 3 жыл бұрын
Thanks man for such interesting question and solution.
@jaganmohanreddymothe6695 3 жыл бұрын
I learnt the answer and advice others to learn. Thanks so much.
@Ganeshkumar-to6xw 3 жыл бұрын
It's a problem of 9th grade student of India
@loureed654 3 жыл бұрын
china the same
@user-ow2vf1dd3j 3 жыл бұрын
Korea in 8th grade
@Tiqerboy 3 жыл бұрын
Maybe they say "Grade 9" in India :-)
@Ganeshkumar-to6xw 3 жыл бұрын
@@Tiqerboy its not a bymistake. This is what he said in video
@sarvesh_soni 3 жыл бұрын
@@user-ow2vf1dd3j in india 9th grade students are 13-14 years
@mehmetkarakose0 3 жыл бұрын
Takılmışız "sadece müziğin dili evrenseldir" diye. Oysa ki her müziğin bir matematiği vardır ve asıl evrensel olan belki de matematiktir . 2+2 tüm dillerde 4 eder .
@evrenunal3644 3 жыл бұрын
Newton matematik için "Evrenin dili" tanımlamasını yapmış.
@johnjordan3552 3 жыл бұрын
Verdigin hesplamanın sonucu 2'nin 4'un +'nin.... tanımına bağlı. Eğer mantik zincirimizde bunlarin tanımiyla ya da bu fonksiyonlarla ilgili bir kırıklık, eksiklik ya da bu işlemin tümünün koşullarını overridelayan bir değişken/etken varsa düpedüz yanlış olan bir şey bile bazen teknik olarak doğru olabilir
@furkanbaris8988 3 жыл бұрын
katılıyorum geometriye bayılırım, ingilizcede sadece basit tanışma faslını bilirim ama videoyu çok iyi anladım :)
@enigmad2485 2 жыл бұрын
O zaman Matematik yapamayanlar da dilsiz oluyor herhalde? :)
@furkanbaris8988 2 жыл бұрын
:)
@MetaView7 3 жыл бұрын
Your channel is making me feel so inadequate. LOL Thanks for all the challenges, and answers.
@shivlalborana1700 3 жыл бұрын
You are God Sir, Best teaching in my whole life and learn very easily. GREAT SIR 👍🏻👍🏻👍🏻
@souvik_pradhan_ 3 жыл бұрын
Love from INDIA..🇮🇳🇮🇳🇮🇳
@wiellnyan 3 жыл бұрын
One of the greatest nations.
@sanjaykanna4797 3 жыл бұрын
Me 2 India 🇮🇳🇮🇳🇮🇳🇮🇳
@johnscarceforpresident1647 3 жыл бұрын
India is the smartest country in the world
@ChilloutLibrary 3 жыл бұрын
Only love will not work, you need to solve the problem in in the first place 😉 Btw, both Asia and Europe are smart
@johnscarceforpresident1647 3 жыл бұрын
Sorry i need to turn the bell on i refreshed the page at the perfect time tho
@ck3908 3 жыл бұрын
good problem, not too hard, not too easy - and good clue on the title - which sort of gave the answer. Took me a while but got it.
@cyberdefender1859 3 жыл бұрын
Thank you very much for solving this problem. Good luck. Hi from Russia.
@user-eo1wn9tk4v 3 жыл бұрын
What is the perimeter? Paul: Imagine that we have a ruler. I guess he has left his ruler somewhere out of the box.
@drorbenuliel9280 3 жыл бұрын
ישראלי!
@user-eo1wn9tk4v 3 жыл бұрын
@@drorbenuliel9280עלית עליי
@ryanramjattan8714 3 жыл бұрын
As a Canadian middle schooler, I got so incredibly close. The outside the box for me
@HackedPC 2 жыл бұрын
8th grade?
@mrhaci7747 2 жыл бұрын
I got 85
@user-sk4em5zn7s 3 жыл бұрын
it's really amazing!!! thank-you!!
@_vineet7865 2 жыл бұрын
Thanks for explaining this ❤️
@user-zm6nm1ot8n 3 жыл бұрын
16 years ago i could solve it in 5 minutes ) but now i think "wow, amazing" :)
@savitajaiswal446 3 жыл бұрын
Just one word to say:- "WOW"
@dariopirtea5409 3 жыл бұрын
Very nicely explained!
@chairman66ers 3 жыл бұрын
Nice video. Nice solution, it's out of the box.. What software do you use to make the video?
@barryjohnson7730 3 жыл бұрын
Directly connect the diagonal！
@ralphbanaga8096 3 жыл бұрын
This made me realise how out of shape I am with math. I remember having this in my grade 4 mock exams in the Philippines.
@radhikadesai7781 3 жыл бұрын
I used trignometry and sin rule but your solution is beautiful
@Raindeux Жыл бұрын
I always make a point to try the problem before watching. I did the whole thing using trig, and when I started watching the first thing you said was "without using trig", duh, no wonder it wasn't so trivial. What a clever solution though. Good video!
@uninstalledsoftwares6266 3 жыл бұрын
Everything was cool until this rotation.. I mean wth!
@miken3260 3 жыл бұрын
I found the length of the perimeters interesting, as far as the angles all triangles equal 180 degrees so solving the unknown angle was no problem .
@taiucnguyen4694 2 жыл бұрын
great video, incredible solution. thanks
@tonyhaddad1394 3 жыл бұрын
Thanks very much presh to this amazing hard puzzle i didnt solved but now i understand it pleaz always share with us that kind of puzzle
@snackydibs4465 3 жыл бұрын
Oh god I can actually recall something like this coming in my 9th grade exams
@sunrevolver 3 жыл бұрын
Alternative solution Create 2 equations involving 2 unknown variables on point E and F. Problem solved..
@lecinquiemeroimage 3 жыл бұрын
No!
@a.k.m.zakaria2992 3 жыл бұрын
Keep going man....I have subscribed you today after watching this genious video😍😍🥰😚😚😘😘
@unclereefer37 2 жыл бұрын
I got that one with triangle math but you still blew my mind twice in this one
@thelearnersshowgv5064 3 жыл бұрын
Equations are Boring part of Mathematics, But I used to see everything in the form of Geometry - Stephen Hawking Me: It's really True !
@abdullahisk9432 3 жыл бұрын
İngilizcem yetersiz olmasına rağmen görerek anladım gayet anlaşılıyor, umamırım mesajımı anlamışsınızdır 😌
@n.662 Жыл бұрын
It's very cool! I don't understand this fact! Thank you!
@738polarbear 3 жыл бұрын
These vids are great . i turned on the notifications for them.
@bekolops 3 жыл бұрын
I couldnt solve this even with trigonometry
@kaimoo100 3 жыл бұрын
Me
@zzzzzzzjsjyue2175 3 жыл бұрын
Law of sines
@hydradynamo3538 3 жыл бұрын
I had a doubt how can you construct 20°and AF=AF' AT SAME TIME
@suresgrg 3 жыл бұрын
kzfaq.info/get/bejne/pdmlmc-DtuDXnWQ.html see the second method
@satyapalsingh4429 2 жыл бұрын
Enjoyed a lot . You are genius.
@thankdi 3 жыл бұрын
thank you for sharing, the method is great
@leonardoginting9307 3 жыл бұрын
Finally, no gougu
@tommydecarite4121 3 жыл бұрын
2:00 F' : let me introduce myself
@tommydecarite4121 3 жыл бұрын
btw this was a cool problem even tho i wasn't able to solve it and found it complicated you made it seem easy
@BlacksmithTWD 3 жыл бұрын
@@tommydecarite4121 That's the thing with any master of skill, they are so good at it that when they do it they make it seem easy. Goes for math, goes for juggling and about anything in between. You only discover how hard it actually is when you are trying to do it yourself.
@jasonlam5297 2 жыл бұрын
It is such an amazing animation in teaching the students. Could you tell me which software you use?
@jtv9953 3 жыл бұрын
May I know the application you used for presentation sir? Could you provide us a video tutorial on how to use it. Thank you very much
@googlecorum462 3 жыл бұрын
i miss you mathematics&geometry.. now im a med student :(
@root8009 3 жыл бұрын
merhabalar. videonun kapak fotografindaki bilinmeyen aciyi 80 derece buldum. siz bu konuda ne dusunuyorsunuz ?
@cerencemal1617 2 жыл бұрын
Şimdi evrenin sırrını çözücen hadi bakalım
@googlecorum462 2 жыл бұрын
@@cerencemal1617 kim evrenin sırtını cözecek reyiz?
@Sam_on_YouTube 3 жыл бұрын
If, instead of rotating 90 degrees, you fold both flaps in to the central triangle, solving the 2nd question becomes trivial.
@zaqmko0 3 жыл бұрын
Nicely done.
@ito4167 3 жыл бұрын
Nice..
@herculesperseus6326 3 жыл бұрын
How would you actually do it with this method lol, there's no clue to prove any triangle to be congruent
@vampire_catgirl 3 жыл бұрын
@@herculesperseus6326 The triangle has a 45 degree angle in the middle of a 90 degree angle. The other angles have to add up to 45 to meet the 90, so they're the same
@herculesperseus6326 3 жыл бұрын
@@vampire_catgirl which means one of them is 20 and the other is 25. How would you mathematically fold both flaps into the central triangle with any evidence it's a perfect fit
@jaloliddinzukhriddinov5820 2 жыл бұрын
That was amazing, thanks for a video
@bruce4139 3 жыл бұрын
This is one of my more enjoyable ones to watch
@tipy7155 3 жыл бұрын
미쳤네 이걸 어떻게 푸노 개천재네 와
@LGALLCacheMBMBATXDDRDPHDMI 3 жыл бұрын
미친
@thechessplayer7076 3 жыл бұрын
Wait a min. In triangle EFC EF square = FC square + EC square That isnt satisfying for their values in terms of x and/or y
@mrmacross Жыл бұрын
Watched a handful of these videos in the last two days. I noticed not once (yet) has the Law of Sines come into play. It actually made finding the perimeter easier than finding the measure of the angle. Still, the solution does seem more satisfying than using Law of Sines.
@dumb_tan2539 3 жыл бұрын
Yayyy! I solved it on my own... It took an hour thou 😁 .. But I'm happy This problem can easily be done by trigo, but offcourse, we can't use it. So after opening the box, and looking outside the box, I thought of rotation.... And boom! It's done 😊.. Presh's problems are always out of the box, which I love ❤❤❤❤
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