Sisagon

Sisagon is figura har sisa gono ji sisa comen.

Meter
Moyun gono de pinpan sisagon is 120° ji oto maxusgi cel 720°.

Zona
Zona de pinpan sisagon har comenli lungoya a is:
 * $$\text{A} = \frac{3\sqrt{3}}{2}a^2.$$