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Bab : Bangun Datar
Sub Bab : Keliling
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Jawaban :
Keliling persegi panjang = keliling persegi
2(p+l) = 4 x s
2((2x-3)+(x+1)) = 4(x+3)
4x - 6 + 2x + 2 = 4x + 12
6x - 4 = 4x + 12
6x - 4x = 12 + 4
2x = 16
x = 8
panjang sisi persegi = (8) + 3
= 11 cm
Semoga membantu :)
—Peanut