Jawabanmu

2014-03-10T09:30:13+07:00
P = 7
l = 3

Keliling = 7+7+3+3 = 20
Luas = 7 x 3= 21
2014-03-10T10:03:38+07:00
Misal p = 7 dan l = 3 K = 2p + 2l 30 = 2.7 + 2.3 30 = 14 + 6 L = p x l 21 = 7 x 3