两条边的比是3:2
(1)若腰:底=3:2
腰:112÷(3+3+2)×3=42厘米
底:112÷(3+3+2)×2=28厘米
(2若底:腰=3:2
腰:112÷(3+2+2)×2=32厘米
底:112÷(3+2+2)×3=48厘米