Jawabanmu

2014-05-30T22:16:17+07:00
K = 2(p + l)
116 = 2[(4x-2) + 2x)
116= 8x -4 + 4x
116 + 4 = 8x + 4x
120 = 12x
x =120/12
= 10

maka p = (4x-2)
= (4.10-2)
= 38 cm
l = 2x
= 2.10
= 20 cm

luas = p x l
= 38 x 20
= 660
2014-05-30T22:56:58+07:00