tolong Dibantu Nomer 35

Diket =
k = 72 cm
l = x
p = 3 l ➡ 3x

a. )
k = 2×(p+l)
72= 2×(3x+x)
72=6x+2x
72=8x
x=72/8
x=9

b. )
L=p×l
=3x×x
=3(9)×9
=27×9
=243 cm²

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