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= 8 cm : 2
= 4 cm
b = d₂ : 2
= 15 cm : 2
= 15/2 cm
a² + b² = c²
4² + (15/2)² = c²
16 + 225/4 = c²
64/4 + 225/4 = c²
289/4 = c²
√289/4 = √c²
17/2 = c
8,5 = c
s = c
= 8,5 cm
La = 1/2 × d₁ × d₂
= 1/2 × 8 cm × 15 cm
= 4 cm × 15 cm
= 60 cm²
Ka = 4 × s
= 4 × 8,5 cm
= 34 cm
LP = 2(La) + (Ka × t)
= 2(60) + (34 × 10)
= 120 + 340
= 460 cm²
Jadi luas permukaan prisma tersebut adalah 460 cm²