Jawabanmu

2014-05-18T19:55:45+07:00
Luas = 1/2 . a. t
120 cm2 = 1/2 . 30 . t
120 cm2 = 15 t
8 cm = tinggi
2 1 2
2014-05-18T19:56:03+07:00
L = 1/2.a.t
120 = 1/2.30.t
120 = 15t
120/15 = t
8   = t

1 1 1