Duadesgon

Duadesgon or 20gon is figura har 20 gono ji 20 comen.

Meter
Moyun gono de pinpan duadesgon is 162° ji oto maxuscu cel 3240°.

Peryaje
Peryaje de pinpan duadesgon har comenli lungoje a is:


 * $$\text{Peryaje} = 5a^2(1 + \sqrt{5} + \sqrt{5 + 2\sqrt{5}}).$$