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求阴影部分面积
(1)如图,阴影部分的环宽恰好等于较小圆的半径,阴影部分面积是较大圆的( )。
(2)求下面图形阴影部分的面积(图中单位:m)。
(3)求半圆阴影部分的面积。
desk, loan reviewloans; loan funds; arrive (MS) charge warehousing, bookkeeping; deduct the principal and interest of loans. lending survey post responsibility have a fixed place of business; operating normally, as well, have sufficient assurance capabilities; good credit records, reputable suppliers; is c
(4)阴影部分的面积(π取3)为( )。
(5)在下图中,大圆的半径是6,求阴影部分的面积。
(6)求阴影部分面积。
desk, loan reviewloans; loan funds; arrive (MS) charge warehousing, bookkeeping; deduct the principal and interest of loans. lending survey post responsibility have a fixed place of business; operating normally, as well, have sufficient assurance capabilities; good credit records, reputable suppliers; is c
(7)如图,矩形ABCD中DC=a,BC=2a ,以C为圆心,CB为半径画弧,交AD于E;以D为圆心,DC为半径画弧,交DA于F,阴影部分面积,
(8)已知三角形ABC中,BD=DC,CE=2AE,AF=3BF,三角形面积是1,求阴影部分面积。
desk, loan reviewloans; loan funds; arrive (MS) charge warehousing, bookkeeping; deduct the principal and interest of loans. lending survey post responsibility have a fixed place of business; operating normally, as well, have sufficient assurance capabilities; good credit records, reputable suppliers; is c
(9)
这个正方形的面积是8平方米.求阴影部分的面积?
(10)下图中,圆周长为12.56厘米,平行四边形ABCD的面积为21.6平方厘米,求阴影部分的面积。
desk, loan reviewloans; loan funds; arrive (MS) charge warehousing, bookkeeping; deduct the principal and interest of loans. lending survey post responsibility have a fixed place of business; operating normally, as well, have sufficient assurance capabilities; good credit records, reputable suppliers; is c