panjang 8 cm,keliling persegi panjang 24 cm,brapa lebar persegi panjang

K = 2p + 2l
24 = 2 × 8 + 2 × l
24 = 16 + 2l
16 + 2l = 24
2l = 24 - 16
2l = 8
l = 8/2
l = 4
lebar nya 4 cm

lebar = (keliling ÷ 2) - panjang
lebar = (24 cm ÷ 2) - 8 cm
lebar = 12 cm - 8 cm
lebar = 4 cm