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100 = 2(p+l)
100/2 = p+l
50 = p+l (Jumlah)
Panjang =3/(3+2) x 50
= 3/5 x 50
= 30 cm
Lebar = 2/(3+2) x 50
= 2/5 x 50
= 20 cm
semoga membantu :)
= 10
100 : 10 = 10
Lebar = 2 x 10 = 20
Panjang = 3 x 10 = 30