As in figure，the area of square ABCD is 169cm2 and the area ofthombus BCPQ is 156cm2.Then the area of the shadow part is
问题描述：
As in figure，the area of square ABCD is 169cm2 and the area ofthombus BCPQ is 156cm2.Then the area of the shadow part is（ ）（英汉词典：square正方形；thombus菱形）A. 23cm2
B. 33cm2
C. 43cm2
D. 53cm2
答
延长PQ到AB于一点M，∵正方形面积为169cm2，∴AB=BC=13cm，∵菱形QBCP的面积为：156cm2，∴菱形边长BC=PC=13，∴△MBQ≌△PCN，正方形面积169cm2减去菱形QBCP的面积156cm2为13cm2，∴矩形AMND面积为13，∵AD=13，∴A...