luas seluruh permukaan kubus yg mempunyai panjang diagonal sisi √72 adalah?

Diagonal sisi = √72 cm
s x √2 = √72
s = √72 / √2
s = √36
s = 6 cm

L. perm. kubus
= 6 x s x s
= 6 x 6 x 6
= 36 x 6
= 216 cm²

Ds = √72
ds = s√2
ds = 6√2
s = 6 cm

Lp = 6 x s x s = 6 x 6 x 6 = 216 cm2