di ketahui balok berukuran 12cm×12cm ×12cm×6cm. jika tinggi limas 8cm. luas permukaan bangun adalah?

L .alas = p x l
= 12 x 12
= 144cm²
K alas = 2 ( p + l )
= 2 ( 12 + 12 )
= 2 x 24
= 48cm
s = √8² + 6²
= √64 + 36
= √100
= 10cm
L. permukaan = L.alas + 1/2 K alas x s
= 144 + 1/2 x 48 x 10
= 144 + 24 x 10
= 144 + 240
= 384cm²