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Jawaban:
Limas
L= L alas + 4 × L segitiga
= (40 × 18) + 4 × ½ × 40 × 20) + (2 × ½ × 18 × 15)
= 720 + 800 + 270
= 1.790²
Balok
L= 2 (p×l+p×t+l×t)
= 2 (40×18+40×15+18×15)
= 2 (720+600+270)
= 2×1.590
= 3.180²
L = 1.970+3.180
=4.970 cm²
[answer.2.content]
