Penjelasan dengan langkah-langkah:
K = 2 (p+l)
240 = 2(5x+7x)
240 = 5 (12x)
240 = 60x
4 = x
p = 5x = 5(4) = 20 cm
l = 7x = 7(4) = 28 cm
Luas
= p × l
= 28 × 20
= 560 cm²
skala
= 40/12000
= 1/300
= 1: 300
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Penjelasan dengan langkah-langkah:
K = 2 (p+l)
240 = 2(5x+7x)
240 = 5 (12x)
240 = 60x
4 = x
p = 5x = 5(4) = 20 cm
l = 7x = 7(4) = 28 cm
Luas
= p × l
= 28 × 20
= 560 cm²
skala
= 40/12000
= 1/300
= 1: 300