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【332225】1.1 相似多边形 拔高练习

时间:2025-01-21 12:29:14 作者: 字数:2639字
简介:

1.1 相似多边形

一、选择题

1.下列多边形中,一定相似的是( )

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 两个矩形  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 两个菱形  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 两个正方形  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 两个平行四边形


2.如图,线段 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,那么 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 等于( )

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>


3.已知小明同学的身高 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,经太阳光照射,在地面的影长为 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,若此时测得一塔在同一地面的影长为 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,则塔高为( )

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>


4.在比例尺为 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 的工程示意图上,于 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 日正式通车的南京地铁一号线的长度大约为 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,它的实际长度约为( )

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>


5.如果整张纸与半张纸相似,则整张纸的长和宽的比是( )

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>


二、填空题

6.已知 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 是成比例的线段,其中 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,则 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> _______ <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

7.已知 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,则 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

8.如果线段 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 线段 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 的比例中项,且 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,则线段 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 的长为__________


三、简答题

9.我们已经学习了相似三角形,也知道了:如果两个图形形状相同而大小不一定相同.我们就把它们叫做相似图形.比如两个正方形,它们的边长对应成比例,对应角相等就称为相似图形.那么下了几组几何图形(1)两个圆;(2)两个长方形;(3)两个菱形;(4)两个正五边形.请指出哪几对是相似图形, 哪几对不是相似图形,并简单说明理由.





10.已知 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,求:

(1)  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 的值;

(2)  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 的值.




11. 如图,平行四边形 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 中, <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 的中点, <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 上一点, <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,连 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 延长交 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,求 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 的值.

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>


12. 如图, <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 中, <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,矩形 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 的边 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 在线段 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 上, <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 分别在 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 上,设 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

1)写出矩形PQED面积 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 的函数关系式;

2)连PE,当 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 时,求矩形 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 面积.

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

参考答案


一 选择题

1C 2D 3C 4C 5B


二 填空题

6 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 7 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 86


三,简答题

9(1)两个圆相似;

(2)两个菱形不一定相似,因为它们的对应角不一定相等.

(3)两个长方形不一定相似,因为它们的对应边不一定相等.

(4)两个正五边形是相似图形.


10. 解(1)  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,∴ <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> = <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

(2) <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,则 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>


11.解析:

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

延长 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 交于 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,可得 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,设 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> .


12.

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>

(1) <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> 为垂足,

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> .

(2) <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> ,∴ <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/743/" title="多边形" class="c1" target="_blank">多边形</a> .