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= ( ∛216 cm³ )² × √2
= ( 6 cm )² × √2
= 36√2 cm²
V kubus = 216,
r kubus = ∛216 = 6
Ditan
Luas bidang diagonal.........?
Jawab :
L bidang diagonal
= r x r
= 6 x 6
= 36