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= 10 cm : 2
= 5 cm
c = 13 cm
a² + b² = c²
a² = c² - b²
a² = 13² - 5²
a² = 165 - 25
a² = 144
√a² = √144
a = 12
t Δ limas = a
= 12 cm
V = V kubus + V limas
= (s³) + (1/3 × La × t)
= (s³) + (1/3 × s² × t)
= (10³) + (1/3 × 10² × 10)
= 1.000 + 333,33
= 1.333,33 cm³
Bangun kubus dan limas menyatu. Maka kubus hanya memiliki 5 bidang sisi, sedangkan limas tidak memiliki alas.
LP = LP kubus + LP limas
= (5 × s²) + Jumlah L sisi tegak
= (5 × s²) + (4 × 1/2 × a × t)
= (5 × 10²) + (4 × 1/2 × 10 × 12)
= 500 + 240
= 740 cm²