求阴影部分的面积。(单位:cm)4Z.y7R8R3R7s:B0r(U'f
4Z.y7R8R3R7s:B0r(U'f
算式:提示-G/d9t7a2S9l4t3k8o9a4Z.y7R8R3R7s:B0r(U'f
答:阴影部分的面积是4`;k*A4P:i;P2v+~平方厘米。4Z.y7R8R3R7s:B0r(U'f