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66 = (3 + l + l) x 2
33 = 3 + 2l
30 = 2l
l = 15
p = 15 + 3 = 18
Luas = 18 x 15 = 270 cm²
Keliling = (x + y) x 2
66 = (3 + y + y) x 2
33 = 3 + 2y
30 = 2y
y = 15cm
x = 15 + 3 = 18cm
luas = pxl
= 18x15
= 270cm²
sekian dan terima kasih :)