Heptadecagon

The heptadecagon is a polygon with 17 sides. A regular heptadecagon has equal sides and equal angles.

Measures
As $$\sin\tfrac{\pi}{17}$$ is expressible with real radicals, the circumradius can be given as $$\frac{2}{\sqrt{8-\sqrt{30+2\sqrt{17}-2\sqrt{34-2\sqrt{17}}+2\sqrt{68+12\sqrt{17}+2\sqrt{34-2\sqrt{17}}+16\sqrt{34+2\sqrt{17}}-2\sqrt{578-34\sqrt{17}}}}}}$$,

the inradius as $$\sqrt{\frac{15+\sqrt{17}+\sqrt{34-2\sqrt{17}}+\sqrt{68+12\sqrt{17}-2\sqrt{34-2\sqrt{17}}-16\sqrt{34+2\sqrt{17}}+2\sqrt{578-34\sqrt{17}}}}{64-8\sqrt{30+2\sqrt{17}-2\sqrt{34-2\sqrt{17}}+2\sqrt{68+12\sqrt{17}+2\sqrt{34-2\sqrt{17}}+16\sqrt{34+2\sqrt{17}}-2\sqrt{578-34\sqrt{17}}}}}}$$,

and the area as $$17\sqrt{\frac{15+\sqrt{17}+\sqrt{34-2\sqrt{17}}+\sqrt{68+12\sqrt{17}-2\sqrt{34-2\sqrt{17}}-16\sqrt{34+2\sqrt{17}}+2\sqrt{578-34\sqrt{17}}}}{256-32\sqrt{30+2\sqrt{17}-2\sqrt{34-2\sqrt{17}}+2\sqrt{68+12\sqrt{17}+2\sqrt{34-2\sqrt{17}}+16\sqrt{34+2\sqrt{17}}-2\sqrt{578-34\sqrt{17}}}}}}$$.

Stellations

 * 2-heptadecagram
 * 3-heptadecagram
 * 4-heptadecagram
 * 5-heptadecagram
 * 6-heptadecagram
 * 7-heptadecagram
 * 8-heptadecagram