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l = l
L = p x l
36 = 4l x l
36 = 4l²
36 : 4 = l²
9 = l²
√9 = l
3 = l
p = 4l = 4 x 3 = 12 cm
l = 3 cm
K = 2(p+l)
K = 2(12 + 3)
K = 2(15)
K = 30 cm
panjang=4x
4x × x =36
=36/4
x=
x=3
lebar=3 cm
panjang=4 x 3=12 cm
keliling=12+12+3+3=30 cm