Fi si awọn ayanfẹ
Yọ kuro lati awọn ayanfẹ
Agbegbe ti a trapezoid, agbegbe agbekalẹ isiro
Agbegbe ti a trapezoid, agbegbe agbekalẹ isiro faye gba o lati ri a agbegbe kan ti a ti trapezoid, nipa awọn agbekalẹ, lilo ipari ti gbogbo awọn trapezoid ẹgbẹ.