Trades Math - Find The Center Of A Circle Using Squares

Рет қаралды 615,286

2 жыл бұрын

One of the easiest methods to find the center of a circle accurately is to use a compass and perpendicular bisectors. However, on a job site a compass is not always readily handy, but you’ll always find squares. So using those squares I’m going to show you how to accurately find the center of a circle using three different methods.

Пікірлер: 438

@rex8255 5 ай бұрын

Machinist: That's WAY off! Carpenter: On the money! Nice!

@D-proGram_Yousef 5 ай бұрын

As a carpenter I can honestly say.." I resemble that remark! " 😅

@SmallSpoonBrigade 5 ай бұрын

@@D-proGram_Yousef The difference is purely the precision of the tools and how they fit together. Wood may well swell or shrink more with changes in moisture than what a machinist will tolerate with metal parts.

@D-proGram_Yousef 5 ай бұрын

@@SmallSpoonBrigade Agreed. I am fully capable of splitting the proverbial hair and taking the time to find the finite absolute. But thank goodness I don't need to go there, too often having to be precise but it does pop up with concrete , foundations grades/elevations, stairs and landings,.. & finding square/ plum when you're 5 stories up hanging by your bootstraps while holding a nail gun and lumber pencil and sighting in a string line. All while it's raining sideways ..lol ahh good ol Washington State freezing rain. Carpenters, framers, siders etc seem to always be challenged for time so sometimes ill use what ever is handy. Until the finish work begins obviously. I've got nothing but respect for those welders machinist and fabricators that deal with exacts and the minutia for 8 hrs a day or more I don't have the bandwidth to do the precision long game. I'm pretty sure we're some of the last tradesmen the way things are looking. Since the next gens are pretty much no shows for the mens jobs up here. too toxic I guess LMAO 😅🤣 👍💪🔨🇺🇲

@DixieDee 5 ай бұрын

@@D-proGram_Yousef It's scary to think of what this current generation is doing. They are more concerned with being mis-pronouned, than actually learning something useful! "Make America Masculine Again!" (Funny that the Acronym of that would be MAMA lol)

@dannyh9010 5 ай бұрын

Cut to size, hammer to fit!

@etherealeagle7680 2 жыл бұрын

Perpendicular bisector of a chord passes through the center of a circle. Nice practical application of geometry. Thanks for posting.

@txtradesman527 2 жыл бұрын

Thank you for watching

@jeromelee1627 6 ай бұрын

Yep

@RobRoschewsk 5 ай бұрын

Except I remember bisecting the chords with a compass

@howardharris576 5 ай бұрын

The perpendicular bisected of two tangents of the circle intersect at the center 4:26

@avantesma1 5 ай бұрын

This video looks like workshop talk, but is actually pure Euclidian maths.

@weejim48 5 ай бұрын

Brilliant, this to me is why KZfaq was invented. Helping people solve problems & teaching people useful skills. Not for just having a rant or meltdown. Very informative, thank you. 👍👍🙏

@PerpetualMan22 4 ай бұрын

I thought is was for fabricating videos about UFOs and other nonsense, writing a lie in the title and attaching some paid advertisement to put some fraud money in the evil pockets

@brucewmclaughlin9072 4 ай бұрын

I see my 83026 hours on youtube is very beneficial

@d3j4v00 4 ай бұрын

DIY stands for Dude, It’s on KZfaq

@KittyBikeOrders 4 ай бұрын

kzfaq.infor6_Qz4T-WMc@@d3j4v00

@sunriseboy4837 4 ай бұрын

Good call, brother!

@tiltedstudio 5 ай бұрын

These are great! Just a quick note on method #1: the only thing that really matters about the square placement for the first two marks is that the apex of that square angle sits on the edge of the circle. You're marking two chord lines which meet on the circle edge and are perpendicular to each other. If you do this, the hypotenuse of the triangle created will by definition pass through the centre of the circle. The point is that you don't need to fret about making these lines the same length - it will work for any placement if the apex is on the circle.

@cthulhufhtagn7520 4 ай бұрын

Additional triangles to double and triple check only take a few seconds

@ramenandvitamins 4 ай бұрын

Thales' theorem!

@c.j.g.6913 3 ай бұрын

And your explanation is why the average person struggles with math! The video presented clear simple explanations that work, without all the useless information.

@tiltedstudio 3 ай бұрын

@@c.j.g.6913 at least 67 people had no problem parsing this additional information. Do you find the idea of additional clarification upsetting?

@user-my3ff5lj6m 5 ай бұрын

I have worked in a machine shop over 40 years and never knew about this simple method. Thanks so much for sharing!

@JavierBriz 5 ай бұрын

so you sold machines, or used them?

@Leonardo-ql1qu 5 ай бұрын

American? MAGA?

@balazslakatos9817 5 ай бұрын

worked as a cleaner?

@Bob-of-Zoid 5 ай бұрын

How do you get to even study to be a machinist without having to show basic high school geometry first? I am an American, but went to school (partial) and apprenticed in Germany, and without that knowledge which you will be tested on in entrance exams, you couldn't even become a framing carpenter!

@Bob-of-Zoid 5 ай бұрын

@@Leonardo-ql1qu Oh dear!

@bikerbobcat 5 ай бұрын

Artist and HVAC guy here, thank you so much for this. So simple, so useful.

@txtradesman527 3 ай бұрын

Glad it was helpful!

@walsakaluk4630 5 ай бұрын

A bit hard for very small stock, but in the adsence of a centre square these methods are excellent first geometric principals for locating centres on circular material. NICE VIDEO AND EXCELLENT REMINDER TO PAY ATTENTION AT SCHOOL. 👌👍🖖

@tengkusulaiman 5 ай бұрын

My teacher taught me this in 1990. Thanks to him for this useful knowledge.

@ChestnutForge 5 ай бұрын

Many thanks for this. It is a great training video I will use for others to learn from. As a blacksmith if you are a machinist or a welder, I will open a conversation on that basis. but within a few minutes I will be asking for solutions to this and other problems. That is because the smith needs to BUILD his tools and jigs. In my shop I have an engine lathe, a mill, 2 drill presses, a hundred year old ironworker, 2 anvils, press brake and will expect to make hammers, tongs, forges, bolster plates and rivet/rivet tools as needed. This video goes to the core competency necessary to create real world items from someone elses imagination.😀👍

@bobadams1696 5 ай бұрын

Very good video. Clear and to the point, and very practical.

@txtradesman527 3 ай бұрын

Glad it was helpful!

@adamgravelin3002 5 ай бұрын

i tried to google this the other day and google assumed i was doing all of this on paper. this is a great video for practical situations where you need to find the center. i ended up fumbling my way into the second method just trying different things, but i needed to draw a perfectly plumb line through the center of my circle and i ended up holding a framing square, a combo square and a level attatched to the combo square. it was a lot of moving parts to line up, but it did the trick.

@txtradesman527 3 ай бұрын

Excellent improvisation!

@stickyfox 5 ай бұрын

The angle formed by two secants is half the included arc angle. If you draw two secants at 90 degrees they will include 180 degrees or half the circle; making the triangle's base a diameter whether or not you drew an isosceles triangle. I forgot about this trig formula after high school but it comes up again and again in machining and drafting.

@pyme495 5 ай бұрын

If they taught it like this in high school math, more of us would've paid attention! 😃

@ricksaunders3889 5 ай бұрын

Exactly.

@paulyork2143 5 ай бұрын

Amen

@Corwin256 5 ай бұрын

It might depend on the student, but I agree overall. Interestingly, as an adult, I was bummed that he didn't give a mathematically rigorous proof for the geometry, even though he offered a practical demonstration that the methods did work.

@eglintonflats 5 ай бұрын

You mean, more dummies like me would pay attention

@DrLumpy 4 ай бұрын

They did. You didn't pay attention.

@fodank 5 ай бұрын

Thanks for this. Simple and true. Love it.

@eadgbefreak 5 ай бұрын

I've always used method 3, which I learned in geometry class. Method 1 is cool too. Method 2 I know works well because they sell a jig, that basically "holds the squares" for you.

@fomoco300k 5 ай бұрын

You actually showed me four ways. Thank you!!

@Kleiner_Lutz 5 ай бұрын

I'm gonna immediately forget about this again until I need it some day and have to rewatch this video

@davidpetrus1748 5 ай бұрын

lol i was thinking of a way to remember how to find this video ha ha

@Chigger 5 ай бұрын

Here's a reminder just in case you need it very soon.

@gppizza8979 4 ай бұрын

here's another reminder just in case

@AsianTankPilot 5 ай бұрын

The last method is what I learned in board drafting. We used a compass find the middle of each chord.

@lowandslow3939 5 ай бұрын

Now THAT was a very useful video. Thank you so much.

@txtradesman527 3 ай бұрын

Glad it was helpful!

@heyyoubuddy6749 5 ай бұрын

Thank you for showing us this trick!!

@marshallcollins8634 5 ай бұрын

Unfortunately I was a shitty student. I didn’t think I needed what they were teaching (especially MATH ) would do me any good. I was thoroughly convinced that I knew it all. I was sooo wrong on every aspect. That if not for spell check, this comment would probably look like a 2nd grader DONE it. I probably would know how to do this if the teacher would have told me (it will help you get GIRLS ) I wish I would’ve learned Math at least 4 or 5 times a day. Thank you for posting this now I have to subscribe to your channel, for this is NOW how I learn what I should have learned 50 years ago.

@Chigger 5 ай бұрын

At least you're learning something. That's what education is.

@drumcdoo9050 5 ай бұрын

Excellent video and straight to the point ~ no B/S and stretching out video for 5 minutes describing the type of scribe, where you got the measuring tools from and how to unbox them etc, before describing tip!

@HenrikMyrhaug 5 ай бұрын

I love the 1st method, because it uses some basic math that is pretty counter intuitive, but easy to prove. I remember my cousin asked me why a triangle with hypotenuse along the diameter of the circle and all 3 corners on the circle makes 90°, and I came up with a pretty clever proof. At first I thought we just had a straight edge, but when i realized it was a square, I was reminded of that theorem.

@jwbnscacpt 5 ай бұрын

Very good information. Thanks!

@vaughnslavin9784 5 ай бұрын

Thank you! Great trick of the trade!

@txtradesman527 3 ай бұрын

You bet!

@Ian-Casper 4 ай бұрын

Learned something today. I appreciate the format.

@txtradesman527 3 ай бұрын

Most welcome.

@davidboose5803 5 ай бұрын

Wow!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I am speechless, what a neat demonstration.

@txtradesman527 3 ай бұрын

Glad you liked it!

@zitternden 5 ай бұрын

Fantastically simple. Thanks!

@apeterson23 Жыл бұрын

You and ICWeld are my favorite tradesmen/fabricators/welders/mechanics on youtube! Lots of skills in those pockets

@txtradesman527 Жыл бұрын

Thank you. I hope to be able to devote more time to this channel in the near future.

@ImtheGhostMagnet 5 ай бұрын

A much simpler method, use the framing square and triangle to measure the diameter, devide by 2, you have the radius, scribe a line at the radius distance, rotate the circle and scribe a second radius line and where it bisects is the center.

@LibertyTalk76 4 ай бұрын

Simple genius is simply awesome. Thank you.

@txtradesman527 3 ай бұрын

You're welcome!

@asd67lkj 5 ай бұрын

Thank you. I need that information at the moment, Liked and saved...

@azimuth4850 5 ай бұрын

Anytime a right angle is inscribed in a circle, the endpoints of the angle are the endpoints of a diameter. The radius of a circle is perpendicular to the tangent line through its endpoint on the circle's circumference. The perpendicular bisector of a chord is a line passing through the center of the circle such that it divides the chord into two equal parts and meets the chord at a right angle.

@JoseDiaz-er4ww 5 ай бұрын

Para aquellos que alguna vez llevamos la materia de "Geometria Descriptiva", esto es un dulce. Si carezco de escuadras, con un lapiz y un hilo, utilizandolos como compás, en 2 minutos encuentro el centro, el radio, el diametro, la circunferencia, el area y cualquier angulo.

@jean-lucpattein653 4 ай бұрын

Super astuces. Thanks 👍🏽👍🏽👍🏽

@alanhean6504 5 ай бұрын

Much appreciated ❤

@doberfart 4 ай бұрын

Very useful, thank you!

@txtradesman527 3 ай бұрын

Glad it was helpful!

@mariolopez-ri8wd 5 ай бұрын

Some new thing I learn today thanks ...

@DixieDee 5 ай бұрын

Great info! Thanks.

@mattjohnson2848 5 ай бұрын

Great video, thank you 😊

@cribbsprojects 5 ай бұрын

Magic! Great video...

@rosiepone 5 ай бұрын

you can also do these with powdered string if you want, it's kinda fun

@bruce-le-smith 5 ай бұрын

super helpful thank you

@paulmaryon9088 5 ай бұрын

That was great, thank you

@txtradesman527 3 ай бұрын

You're very welcome!

@Jeff-rk8hq 5 ай бұрын

This dude has taught me so much I swear it’s the same dudes voice that does tx tool cribs or something does knots and amazing vise stands

@txtradesman527 3 ай бұрын

One and the same.

@Jeff-rk8hq 3 ай бұрын

@@txtradesman527 haha makes sense, I figured you knew Txtc or something by the name but i couldn’t be sure, anyways thanks for your vids though man I have really enjoyed and learned a shit ton from you so thank you for sharing…I have been planning to build a vise stand inspired by the one you made, I’ve just learned to weld (or weld enuf to stick 2 pieces of metal together l😂 ) so If you have any tips on sourcing or salvaging any of the materials for the build and having much more experience knowledge on the subject seeing as you’ve done it yourself figured you may have some wise advice on places to get metal for reasonable prices or even better places to salvage it

@crawford323 5 ай бұрын

Outstanding!

@jobmunene3263 5 ай бұрын

Wonderful application.

@John-yt5zr 5 ай бұрын

Excellent information, thanks for sharing this with us 👏👏👏

@txtradesman527 3 ай бұрын

My pleasure

@kinrettler2431 2 ай бұрын

Amazing!

@TheOfficialDjProduct 5 ай бұрын

I don't know if I'll ever need this. But interestingly enough you could do the last method with just a tape measure. Using it as a straight edge you could do 3 sides, then using the tape as a straight edge you could connect the 3 lines and find the center. And you could find the center on much larger circles (for however large your tape is), with whatever tolerance you allow.

@ussxrequin 4 ай бұрын

This was very informative, thank you (:

@txtradesman527 3 ай бұрын

You're so welcome!

@davidoickle1778 3 ай бұрын

Good stuff!

@danalaniz7314 5 ай бұрын

Excellent. Thank you!

@txtradesman527 3 ай бұрын

You're very welcome!

@richardkut3976 5 ай бұрын

Nice, thanks.

@dalusa81 4 ай бұрын

wow super helpful thanks!!!

@robertjackson1407 5 ай бұрын

Thank you 😊

@tedbaxter5234 5 ай бұрын

Very nice, thank you!

@brianvannorman1465 5 ай бұрын

Thank you.

@BensWorkshop 5 ай бұрын

Good tips.

@metheewatchakittikorn4796 5 ай бұрын

Thank you very much.

@zapa1pnt 5 ай бұрын

Very helpful. Thank you. 😁✌🖖

@olgajoachimosmundsen4647 5 ай бұрын

Can also set the circle against a wall and measure out x. Then you rotate it untill you create a pattern that reveals centre

@victordelomas 3 ай бұрын

Very good. Thks Sr.

@txtradesman527 3 ай бұрын

Most welcome

@R3xR3volution8 5 ай бұрын

Thank You! :)

@edgeofentropy3492 2 ай бұрын

OR, if you have access to a lathe, you can chuck this material up and use a center drill in the tail stock to find the center.

@rvvanlife 5 ай бұрын

Thank you 👍

@txtradesman527 3 ай бұрын

You bet!

@middleway1885 3 ай бұрын

Cheers!

@maxenielsen 5 ай бұрын

Nice!!!

@_JohnRedcorn_ 5 ай бұрын

Very cool

@rbaron7352 5 ай бұрын

Not only trades math, but basic geometry that is taught in any decent high school geometry course.

@PenDragonsPig 3 ай бұрын

The angle in a semicircle is a right angle. Any lines from the ends of the diameter will intersect on the arc at a right angle. First year secondary school (🇬🇧) 54 years ago, circle theorems I guess, and never used- not in house, garden, farming, hunting, shooting/sniping, angling, ware house, dealer/croupier, degree in history, motorcycle, 4x2, 4x4, street, dirt.

@bombardier3qtrlbpsi 4 ай бұрын

Nice job 👍

@txtradesman527 3 ай бұрын

Thanks 👍

@fightforjustice3744 5 ай бұрын

Thank you.....

@martinkuliza 5 ай бұрын

and as always basic math that we used to do in the old days impresses people today :P

@Guido_XL 5 ай бұрын

Indeed. The old-school trigonometry that we used to learn and took for granted as the rational and straightforward way to do it, appears now as some sorcery from another dimension to the next generations, which is accustomed to "smart" phones and even AI to bail them out. Whenever I do some mental calculation in the presence of young colleagues, they respond astonished that something like that is humanly possible at all...

@ronnym1977 4 ай бұрын

I like the second one best.

@MyKharli 4 ай бұрын

i used to just use a tape measure or any straight line to find the widest part aka the diameter and draw a line , repeat around the circle and the center will be where the lines cross .

@user-ky8eq4hq6p 5 ай бұрын

Good very nice.

@bignicebear2428 5 ай бұрын

It's right there, in the middle. 😂

@iansun42 5 ай бұрын

Yeah, I came up with the third one on my own after reading the title, I’m pretty cool

@SteveMacSticky 4 ай бұрын

Thanks

@bigtater29 5 ай бұрын

Nice. 👊

@Oddman1980 4 ай бұрын

Useful things my math teacher failed to mention #468

@txtradesman527 3 ай бұрын

😂

@nezarmahmoud7728 5 ай бұрын

Deserve subscription

@txtradesman527 3 ай бұрын

I appreciate it very much.

@nitdiver5 5 ай бұрын

Where I need this is some 6” ceiling lights come with a template with no marked center or center hole. Thank you.

@Georgiaguntraining 7 ай бұрын

Most excellent! Thanks.

@AffordBindEquipment 5 ай бұрын

Two pieces of wood or metal about 12 inches long, screw together at one end, attach a pencil or pen on one leg. Protractor. Make arcs to center around perimeter and center is shown, even if the arcs aren’t perfectly on center. Way faster and you can keep the new tool for the next time.

@tokin42 5 ай бұрын

Snuggle it up into the corner of the framing square the use the 90 of the speed square on the other side to find the diameter of the circle. Move the speed square to the half way point of the measurement and mark. Do this with the speed square along both the side and top part of the framing square without moving anything but the speed square.

@lakshmireddy5416 5 ай бұрын

Nice video

@txtradesman527 3 ай бұрын

Thanks

@terry_willis 3 ай бұрын

Slick!

@Drinksfromtap 5 ай бұрын

Ahh, so this is the type of content you get when your watch history has a KPop band TxT and talking hands maker videos 😂 great video, I use the first trick to cut cake but didn’t know about the second two. Thanks.

@Heraclitean 5 ай бұрын

To cut cake? yikes.

@Drinksfromtap 5 ай бұрын

@@Heraclitean I don’t use a square but I use the concept :) and if you’re saying it’s weird I admit it and it drives my wife nuts!

@MicahThomason 4 ай бұрын

I arbitrarily prefer the last method. Good video.

@txtradesman527 3 ай бұрын

Thank you

@UnitNo.2 4 ай бұрын

Nice.

@Patat0four 5 ай бұрын

Put on a piece of paper and draw the circle. Fold I half and using the transparency of the paper to align the two half circles. Fold again again using transparency to align the quarter of circle. Cut a tiny piece of the corner, unfold and boom, hole would be right in the circle and the round piece you want to mark.

@mnFlatLander 4 ай бұрын

WHERE HAVE YOU BEEN ALL MY LIFE?!?!?!?

@amandahanson8188 6 ай бұрын

Answered my questions. Great video. You earned my sub. Cheers from Wisconsin.

@txtradesman527 3 ай бұрын

Thanks for the sub!

@Idunnoaboutyou 4 ай бұрын

Awesome hack bro

@txtradesman527 3 ай бұрын

I hope you can find it useful

@user-zh6xz3rj9n 5 ай бұрын

Here is another method. Inscribe ANY parallelogram you like inside the circle. Then criss-cross the corners of the parallelogram. The center of the circle is the center of the parallelogram.