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96 = 12 x lebar
lebar = 96 : 12 = 8
maka panjang = 12 cm, lebar = 8 cm
keliling = 2(p+l)
keliling = 2(12+8)
keliling = 2 (20)
keliling = 40 cm
Luas = 96
L=p.l
96=12.l
96:12=l
l=8
kel = 2(p+l)
=2.20
=40