setiap sisi × 2
jadi a=20×2=40
b=12×2=24
c=60-20=40
d=60+20=80
semoga membantu
#backtoschool2019
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setiap sisi × 2
jadi a=20×2=40
b=12×2=24
c=60-20=40
d=60+20=80
semoga membantu
#backtoschool2019