Fi si awọn ayanfẹ
 
Yọ kuro lati awọn ayanfẹ

Agbegbe ti a onigun, agbegbe agbekalẹ isiro

Agbegbe ti a onigun, agbegbe agbekalẹ isiro faye gba o lati ri a agbegbe ti a onigun, nipa awọn agbekalẹ, lilo ipari ti onigun mejeji.
a:   b:  

Agbegbe ti a onigun

Onigun ni a quadrilateral pẹlu mẹrin ọtun awọn agbekale. Agbekalẹ fun agbegbe ti a onigun: P=2(a+b),
ibi ti a, b - mejeji ti a onigun