如图，将半径为10厘米的四分之一圆沿着线段AB对折．请求出阴影部分的面积。（单位：厘米）8M9s+L1x(b3p3J.m/_
8M9s+L1x(b3p3J.m/_
算式：提示4Y;U,M0w2l0I3A)o'L:i9`2|8g7S6y8M9s+L1x(b3p3J.m/_
答：阴影部分的面积是.i.`/k5x2B4M平方厘米。8M9s+L1x(b3p3J.m/_