求下图中阴影部分的面积，已知圆的半径为4厘米。:b5L0W,|-H+N
:b5L0W,|-H+N
算式：提示.F:~/o7H+_+M;G)g,A'}(d(^:b5L0W,|-H+N
答：阴影部分的面积是5h0r3m;j3^3P5_平方厘米。:b5L0W,|-H+N