Prisma segitiga
a = 12 cm
b = 16 cm
c = 20 cm
t = 15 cm
Lp = (2 × (1/2 × a × b)) + ((a + b + c) × t)
Lp = (2 × (1/2 × 12 × 16)) + ((12 + 16 + 20) × 15)
Lp = (2 × 96) + (48 × 15)
Lp = 192 cm² + 720 cm²
Lp = 912 cm²
Luas permukaan prisma tersebut adalah 912 cm²
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Prisma segitiga
a = 12 cm
b = 16 cm
c = 20 cm
t = 15 cm
Lp = (2 × (1/2 × a × b)) + ((a + b + c) × t)
Lp = (2 × (1/2 × 12 × 16)) + ((12 + 16 + 20) × 15)
Lp = (2 × 96) + (48 × 15)
Lp = 192 cm² + 720 cm²
Lp = 912 cm²
Luas permukaan prisma tersebut adalah 912 cm²