ta có Sadc=1/2 SABC ( vì DC=1/2BC). SADE=1/2 SADC(VÌ AE=1/2AC) SAME=1/2SADE (VI ME=1/2ED)
SAME=1/8SABC. SAME= 10CM
=22,5 cm2 đúng 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
10 cm2 là sai nhé bởi vì 180:10=22,5