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= 1/3 x (6x6) x 15
=1/3 x 36 x 15
= 180 cmkubik
= 36 × 2
= 72
a² + b² = c²
s² + s² = c²
2s² = 72
s² = 36
√s² = √36
s = 6
L = s × s
= 6 × 6
= 36 cm²
V = 1/3 × L × t
= 1/3 × 36 cm² × 15 cm
= 1/3 × 540 cm³
= 180 cm³