作业帮以下求各图形阴影部分的周长和面积
来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/05/23 11:29:11
以下求各图形阴影部分的周长和面积
只有最后一张求周长和面积，其它都求面积
只有最后一张求周长和面积，其它都求面积
①
C=(3×2)π/4+3+3+(1+1)π
=3.5π+6
=16.99
S=3²-3²π/4+1²π/4
=9-2π
=2.72
②
C=(2×2)π/4+√(2²+1²)+(1×2)π/4+1
=1.5π+1+√5
=5.71+√5
S=2²π/4-2×1÷2+1²π/4
=1.25π-1
=2.925
③
C=4²π/4+√[(8+4)²+4²]+8
=4π+4√10+8
=4.56+4√10
S=(8+4)×4÷2-(4×4-4²π/4)
=8+4π
=20.56
④
C=4π/2+4
=2π+4
=10.28
S=2×2
=4
C=(3×2)π/4+3+3+(1+1)π
=3.5π+6
=16.99
S=3²-3²π/4+1²π/4
=9-2π
=2.72
②
C=(2×2)π/4+√(2²+1²)+(1×2)π/4+1
=1.5π+1+√5
=5.71+√5
S=2²π/4-2×1÷2+1²π/4
=1.25π-1
=2.925
③
C=4²π/4+√[(8+4)²+4²]+8
=4π+4√10+8
=4.56+4√10
S=(8+4)×4÷2-(4×4-4²π/4)
=8+4π
=20.56
④
C=4π/2+4
=2π+4
=10.28
S=2×2
=4