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a = 1/2 x 18
= 9
LΔ₁ = a x t
= 5 x 15
= 75
tinggi segitiga tegak pada alas lebar
a = 1/2 x 10
= 5
LΔ₂ = a x t
= 9 x 13
= 65
luas alas persegi pajang
La = p x l
= 18 x 10
= 180
luas permukaa limas
Lp = La + 2 ( LΔ₁ + LΔ₂)
= 180 + 2( 75 + 117)
= 180 + 384
= 564 cm²
jawabnya 564 cm²