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l = (2x + 2) cm
K = 36 cm
2(p + l) = K
2(3x + 1 + 2x + 2) = 36
2(5x + 3) = 36
10x + 6 = 36
10x = 36 - 6
10x = 30
x = 3
p = 3x + 1
p = 3(3) + 1
p = 10 cm
l = 2x + 2
l = 2(3) + 2
l = 8 cm
l = (2x + 2) cm
K = 36 cm
Jawab:
K = (p + l) x 2
((3x + 1) + (2x + 2)) x 2 = 36
(3x + 1 + 2x + 2) x 2 = 36
(3x + 2x + 1 + 2) x 2 = 36
(5x + 3) x 2 = 36
5x + 3 = 36 : 2
5x + 3 = 18
5x = 18 - 3
5x = 15
x = 15/5
x = 3
p = 3x + 1 = 3 x 3 + 1 = 10 cm
l = 2x + 2 = 2 x 3 + 2 = 8 cm
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