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S² = 96
S =√96
S√3 = D. ruang
= √96√3
= √16√6√3
= √16√9√2
= 12√2 cm
96 = 6.s²
s² = 96/6
s² = 16 -----> s = √16 = 4 cm
jadi, diagonal ruang = s√3 = 4√3 cm