立体图形的表面积和体积(1)1: 图一 表面积 (10x15+15x8+10x8)x2 =(150+120+80)x2 =700 体积15x10x8=1200图二表面积10x10x6=600 体积10x10x10=1000图三表面积8÷2=4 3.14x4x2+3.14x8x12 =3.14x16x2+3.14x8x12 =100.48+301.44 =401.92 体积3.14x4x12 = 3.14x16x12 =602.88【请关注零五网:https://www.05wang.com/】2:(40x30+40x25+30x25)x2 =(1200+1000+750)x2 =590 |