教室宽度=7.2×1.3=9.36米长方形周长=2×(长+宽)=2×(7.2+9.36)=33.12米长方形面积=长×宽=7.2×9.36=67.392平方米
宽:7.2x1.3=9.36(m)周长:(7.2+9.36)x2=33.12(m)面积:7.2x9.36=67.392(m²)
周长=2×(7.2+7.2×1.3)=33.12m面积=7.2×7.2×1.3=62.208m^2
7.2X1.3X7.2