求下面图形阴影部分的面积。（单位：厘米）1z8g3f5B0G4A5M:k'w4s0j
1z8g3f5B0G4A5M:k'w4s0j
算式：提示3{1l;B7{,w)N8`+X8n6x1u.Z+s4G6K0c'x-G1z8g3f5B0G4A5M:k'w4s0j
答：阴影部分的面积是-W/C;}'Q8g6X.\平方厘米。1z8g3f5B0G4A5M:k'w4s0j