Jawabanmu

2014-05-19T21:42:26+07:00
2014-05-19T21:43:29+07:00
Sisi = 40 : 4 = 10 cm
panjang 1/2 diagonal 2 = 10² - 6²
= √64
= 8 cm
diagonal lain = 16 cm
luas = 12 x 16
             2
= 96 cm²