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= 12 cm
b = p
= 16 cm
a² + b² = c²
12² + 16² = c²
144 + 256 = c²
400 = c²
√400 = √c²
20 = c
b = Diagonal persegi panjang : 2
= 20 cm : 2
= 10 cm
c = p rusuk tegak
= 26 cm
a² + b² = c²
a² = c² - b²
a² = 26² - 10²
a² = 676 - 100
a² = 576
√a² = √576
a = 24
t limas = a
= 24 cm
V balok = p × l × t
= 16 cm × 12 cm × 10 cm
= 1920 cm³
V limas = 1/3 × La × t
= 1/3 × p × l × t
= 1/3 × 16 cm × 12 cm × 24 cm
= 16 cm × 12 cm × 8 cm
= 1536 cm³
V gabungan = V balok + V limas
= 1920 cm³ + 1536 cm³
= 3456 cm³
Jadi volume bangun tersebut adalah 3456 cm³ (A).