Nonagon construction with straght and compass at 9.2E-14

It take me four days to find this hyperaccuracy method to construct Nonagon at relative error 9.2E-14. This final version can be drawed normaly by straght and compass.

construct a Nonagon with 2E-10

I had got a little progress for Nonagon which close to 1E-10, I hope i can reach 1e-11. detail see the image.

construction a Nonagon with error 4.4E-10

I got a little improvement for the Nonagon construction by compass and straight. It is a little bit complex than beofre. Details see the image.

construction a Nonagon with error 9.5E-10

I had found a method which can construction a Nonagon with hyper accuracy by compass and straight. See image for the details.

I am still working for higher accuracy for Nonagon.

construct a Nonagon with Hyper accuracy by compass and straight

I just found another new method which can create Nonagon central angel with hyper accuracy. The relative error is about 4.6E-8. I think it is the best accuracy so far.

draw a perfect Nonagon

Nonagon is a very interesting regular polygon. Theoretically it is nonconstructive. But I found a simple way to draw a perfect nonagon with very little angel error. the accumulation error is 0.007° which is the best one than any published classic method.

The detail steps are listed on the picture.