How to draw a regular octagon inscribed in a circle 

Brief, to the point, easy to understand, well delivered. Thank you~!

Thanks Arthur A brilliant technique and school will never be able to teach us this masterpeice ❤❤❤❤

3:48 Yes it really helped for my Technical Drawing Classwork, thanks so much

This is an excellent video, as others I have seen from Arthur Geometry. The explanation is clear, and the use of the simulated compass and drafting triangle is very effective. However, a minor improvement, which reduces the number of steps with the auxiliary lines from nine to six (because there is no way to avoid the eight steps to draw the eight sides of the octagon) is to directly bisect the right angles at the two top quadrants with four arcs, two of them are shared between those two top quadrants. Then, the two diagonal bisectors obtained, at 45° each, are extended so they reach the circle at their both ends. This construction works also to easily inscribe a square, with vertical and horizontal sides, inside a circle, the vertices are at the four bisectors-circle intersections. But the vertices of that square, which we don't need to draw for the octagon, are vertices also of the octagon, together with the intersections of the vertical and horizontal axes with the circle. So, in total, is 14 steps compared with 17 steps in the video. I hope this suggestion is found useful.

Thank you for this tutorial, it helped me alot with my homework.

Thanks a bunch, very easy to follow!

Thanks man tomorrow is my test

Thank you, you help so much ❤️❤️

Thank you so much, this video helps a lot of people till today

Yes thank you this has helped a lot I have been searching for this for a long time thanks a lot😀

Isn’t it easier to make 45 degrees in each triangle the same way you did with the 90s?

Helped me a lot . Thanks

I really appreciate it is videoed really help me I hope you get more likes for this video there's still hope in the future good luck

This was so helpful, thank you!

Thank u so much. But there is another easy method of drawing perpendicular bisectors

Vary nice vidoe

Thanks for this video. It is so easy for me.

You saved my life

Thank you very much!

tank u sir for your tutoriel.. so helpful

This is another good method though! Thanks Sr!

Thank You, much appreciated ;-)!

Very helpful thanks

Thank you so much man

Thanks you this video helped me so much

Thank you sir it's very useful

tysm I did this back over in AutoCAD

thanks from Bangladesh

thanks u made my day

So helpful

nice thanks

Ofter drawing a ractange inside a circle how many we should have need to open compos

How about drawing 45 degree line and joinng that line from centre, taking the arc and cuttng into 8 parts as 8*45=360. Finally join all the lines?

thank you sir

Thx bro

Tqro

thanx

is it across flat or across corner. i need it of across flat

Grande tío para cuando ejercicios de hiperbola??🤗

pencil color combination where to dark where to light a line

tips on sharpening the pencil,

A progression of pentagrams, construction from scratch,

Root 2 Spiral

thanks 😉😉😉😉😉😉😉😉

Spiral from a Pentagon

It is very Long process 🤔

Who else thought the intro was how ro draw it?🤔

Yh this bad😂😂😂😂😂😂

This didn't help me at all