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k=2(p+l) =136
=2(l+4+l) =136
=2l+8+2l =136
=4l + 8 =136
=4l = 136-8
=4l = 128
=l = 128÷4
=l = 32
p=l+4
=32+4
=36
luas = p×l
= 36×32
= 1152 m persegi
semoga bisa membantu
136 = 2 ( p + (p-4))
136 = 2p + 2 (p-4)
136 = 2p + 2p - 8
136 = 4p - 8
4p = 136 + 8
p = 144 : 4
p = 36
p = 36 m
l = (p - 4)
= 36 - 4
= 32m
luas = p . l
= 36 × 32
= 1152 m`2