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keliling persegi panjang =
2 (p+l) = 132
2(7x+4x) = 132
2.11x = 132
22x = 132
x = 6
panjang = 7x = 7.6 = 42 m
lebar = 4x = 4.6 = 24 m
luas persegi panjang = 42.24 = 1008 m²
senang membantu :)