WOLFRAM|DEMONSTRATIONS PROJECT

Albrecht Dürer's Heptagon of 1525

​
step
1
2
3
4
5
6
7
8
… and about
P
6
and
P
3
.
This Demonstration shows a heptagon constructed in six easy steps using a straight edge and compass.
The heptagon is not regular. For example, one angle at the midpoint is ≈ 51° 19' instead of 360° / 7 ≈ 51° 26'.