carilah luas bangun berikut
L = 2 × ( luas alas) + ( keliling alas) × tinggi
L = 2 × 1/2 × 10 × 8 + (8+10+7 ) × 9
L = 2 × 40 + 25 × 9
L = 80 + 225
L = 305 cm²
L = 2 × ( luas alas) + ( keliling alas) × tinggi
L = 2 × 1/2 × 10 × 8 + (8+10+7 ) × 9
L = 2 × 40 + 25 × 9
L = 80 + 225
L = 305 cm²