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192 = 3d²
192/3 = d²
64 = d²
√64 = d
8 = d
jadi diagonal sisinya 8 cm
192 = s² × 6
192 : 6 = s²
32 = s²
√16×2 = √s²
4√2 = s
a² + b² = c²
s² + s² = c²
(4√2)² + (4√2)² = c²
16√4 + 16√4 = c²
(16 × 2) + (16 × 2) = c²
32 + 32 = c²
64 = c²
√64 = √c²
8 = c
Diagonal sisi = c
= 8 cm
Jadi panjang diagonal sisi kubus tersebut adalah 8 cm.