求阴影部分的面积。（单位：m）3d4N2@/Y5n:p5b6e/l8P3n;c(~8h7f)A7W
3d4N2@/Y5n:p5b6e/l8P3n;c(~8h7f)A7W
算式：提示1?3p+W6A5r9K+S;I;g:b3B2Y;A5j)F3l3d4N2@/Y5n:p5b6e/l8P3n;c(~8h7f)A7W
答：阴影部分的面积是6~8W)_0i6`-J,r(f平方米。3d4N2@/Y5n:p5b6e/l8P3n;c(~8h7f)A7W
算式：提示5i,M,x-P(w+t*M3d4N2@/Y5n:p5b6e/l8P3n;c(~8h7f)A7W
答：阴影部分的面积是3k0Y9K,f平方米。3d4N2@/Y5n:p5b6e/l8P3n;c(~8h7f)A7W