北师版四下数学2.5四边形的分类 同步练习【含答案】.pdfVIP

5、四边形的分类

一、把图形的序号填在相应的圆圈里。

198765432

平行四边形梯形

二、下面图形中哪些是梯形？在括号里“√”。

（）（）（）（）（）（）

三、动动手，动动脑。

1、在下面的梯形中画一条线段，把它们分割成一个三角形和一

个平行四边形。

2、在下面的三角形中画一条线段，把它们分割成一个梯形合一

个三角形。

四、在下面的点子图上按要求画图。

···························································

···························································

···························································

···························································

···························································

······················································

三角形长方形平行四边形

梯形

五、下面那两个图形可以拼出长方形、平行四边形和梯形？试着

自己制作一副七巧板，并剪下来拼一拼。

六、下面哪些图形是轴对称图形？有几条对称轴？画出它们的对

称轴。

七、你能从下图中找出多少个平行四边形？

答案：略