Jawabanmu

2014-05-13T19:13:56+07:00
L = 1/2 x a x t
L = 1/2 x 20m x 20 m
L = 1/2 x 400m
L= 200m
2014-05-13T19:15:33+07:00
Luas = alas x tinggi . 1/2
= 20.20.1/2
= 200 m²