Jawabanmu

2014-06-05T14:11:38+07:00
Luas layang= di xd2
 = 1/2( 8x5) = 20 cm kuadrat
2014-06-05T14:19:54+07:00
A (8,5), B(8,8), C(5,8) = 8,5 kali 8,8 kali 5,8 = 433,84 : 2 = 216,92