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= 1/2.16x12 =96 cmpersegi
luas belah ketupat = alas Prisma
L = 2 × L.alas + kel.alas ×t
= 2 × (1/2.16.12) + 4(10) × 12
= 2 × 96 + 480
= 192 + 480
= 672 cm²
semoga membantu
tandai sebagai yang terbaik ya