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keliling persegi panjang=2(p+l)
=2(8+7)
=2 × 15
=30 cm
Jadi keliling persegi panjang=30 cm
panjangnya = 8 cm
dit : keliling persegi panjang
jawab :
luas persegi panjang = panjang x lebar
56 = 8 x lebar
lebar = 56 : 8 =7
lebar = 7, panjang = 8
maka kelilingnya = 2 (p+l)
= 2(7+8)
= 2(15)
= 30
kelilingnya = 30 cm