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28 = (2+l) + (2+l) + l + l
28 = 4 + 4l
28 - 4 = 4l
24 = 4l
24 : 4 = 4l
6 = l
p = l + 2
= 6 + 2
= 8
L = p × l
= 8 × 6
= 48
semoga membantu
28 = 2(l+2) + 2l
28 = 2l + 4 + 2l
28 - 4 = 4l
4l = 24
l = 6
luas = pl
= 8 x 6
= 48 cm2