Isi yang nomer 2 yaaa

1. panjang = 20 cm, keliling = 72 cm
lebar = keliling ÷ 2 - panjang
lebar = 72 cm ÷ 2 - 20 cm
lebar = 36 cm - 20 cm = 16 cm

2. lebar = 23 cm, keliling = 130 cm
panjang = keliling ÷ 2 - lebar
panjang = 130 cm ÷ 2 - 23 cm
panjang = 65 cm - 23cm = 42 cm