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= √169
= 13 cm
2) Panjang = 2x
lebar = x
kell = 2(p+l)
60 = 2(2x+x)
60 = 2(3x)
60 = 6x
x = 10
panjang = 20
luas = p x l
= 20 x 10
= 200 cm2
1) 169=s²
s=13 cm ---->panjang sisi
2) p=2l
K=2.2l+2.l
60=4l+2l
lebar=60:6=10
maka panjang=2.l=2.10=20
L=p.l=20.10=200 cm²