Відео

Wow thanks alot didn't know how i would construct a regular octagon starting with a square....thanks

Live saver i passed my DT test 🎉

Short and sweet😀

Cool merci

Brilliant, well done, thank you, I knew there must be a way.

Thanks very much. But why do you cross out your seven?

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Wish I had a compass

Thank you for this

FINALLY THANKS DUDE

when youtube teaches better than school ✨

if you don't have a compass, just use the measurement from center to corner and mark from the corners.

The video quality is so low :( Everything looks like a blur

Hello Creagh College Tech Dept, It is unnecessary to indicate the length of the square, it can be any size..

Huge help thank you

TOO GOOD . THANKS A LOT. IT WAS OF GREAT HELP TO ME

Thank u it is so easy to draw

Neat and good presentation 👏

- Another great geometry lesson w/o the excessive numbers & lines & "stuff." Thanx.

thank u so much u help me pass my exams :D

nice sir ji

I'm trying to handcraft a wooden ring and I gotta say, centring that shape over a hole is incredibly difficult.

Thank you! I've been looking for a simple way to make an octagon from a square, and knew there must be a simple way. And here it is.

My son and I just did this with simalar method ... For a homeschooling exam ... Then built a fire safety platform for a kerosene heater to show the applied mathematics at work .

Tomorrow is my test !!!!!!

wow man thanks u so much it does help me on my work

This is great thanks

Wow this is actually really simple. Thanks!

CNM Technology Department is better, I'm sorry but it's the truth.

You should go to woodprix if you'd like to make it yourself guys :)

Chuck Norris saw this....

Are all sides equal?

than u so much😭

Thank-you! This made it very simple. To the point, no annoying music or chatter.

Good, we have an octagon in a square - but how good is it? Let's find out! Clearly all the angles are equal, and the lengths of sides 1-2, 3-4, 5-6, and 7-8 are all the same, as are the lengths of sides 2-3, 4-5, 6-7, and 8-1. But are these two groups of sides all the same length? I'll calculate one first, then the other, and see how they compare. You gave a length of 180mm as the length of your square's sides, but for the sake of the argument I will call that value N. Now, when you draw the arcs, the length from the center of the arc to any point on the arc is N*sqrt(2)/2. So the amount outside the arc is N*(1-sqrt(2)/2). Removing the two sections on either side of side 1-2, then, gives us a length of N - N*(2-sqrt(2)), or N*(sqrt(2)-1). Meanwhile, the triangles cut off are right isosceles triangles. The legs are both length N*(1-sqrt(2)/2), meaning the hypotentuse, side 2-3, is N*sqrt(2)*(1-sqrt(2)/2), or N*(sqrt(2)-1). So we have a regular octagon after all! To be honest, I'm actually kind of relieved - I've seen quite a few videos claiming to offer compass-and-straightedge ways for an arbitrary regular polygon to be inscribed in a circle, or to be drawn given a known side - never mind the fact that it's been proved that only certain regular polygons can even be constructed PERIOD using only those two tools!

in this course we have to be stronger enough

good

good job mate

Very good😃👍

Hey im jack and im here to tell you about the Word octagon

ur saving my exams dude

Thank you really helped a lot