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K alas = 48
tinggi = 8
maka :
Keliling persegi = 4 x sisi
48 = 4 x sisi
sisi = 12 cm
Luas alas = sisi x sisi
= 12 x 12
= 144 cm²
L = Luas alas + ½ × Keliling alas × t
= 144 + 1/2 (48) x 8
= 144 + 24 x 8
= 336 cm
tinggi segitiga:
= √6²+8²
= √36+64
= √100
= 10 cm
luas permukaan:
= 12² + 12 x 10 / 2 x 4
= 144 + 240
= 384 cm²