bantuin yaaa
keliling persegi panjang 60 cmdan panjangnya 20 cm.Hitunglah lebarnya.....[
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k= 60 cm
p=20 cm
ditanya lebar...?
jawab
k= 2(p+l)
60=2(20+l)
60=40+2l
60-40=2l
20=2l
l=20/2
l= 10
jadi lebarnya 10 cm
60 cm = 2.20cm * 2l
60 = 40 * 2l
2l = 60-40
2l = 20
l = 20/2
l = 10 cm :)