Jawabanmu

2014-04-25T15:36:33+07:00
Luas = 2 x Luas alas + keliling x tinggi = 2 x 1/2 x 8 x 10 + (7+8+10) x 8 = 80 + 25 x 8 = 80 + 200 = 280 cm persegi ♔♔