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diagonal sisi = 5√2cm
sisi = 5cm
Jadi, Luas permukaannya : 6 x 5 x 5 = 150cm.
2S² = 16
S² = 8
S =√8= 2√2
Luas permukaan = 6S²= 6.√8²= 6x8 = 48cm²
B). S² + S² = (5√2)²
2S² = 25x2
S² = 25
S = 5
L.P= 6.S²= 6 x 25 =150cm²