2. Click
,create a sketch on
. Firstly, use the function
to create an a horizontal line through the origin. Then ,use
to draw 3 arcs. The relevant operations are as follows.
![](file:///C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ksohtml\wps2BC.tmp.png)
![](file:///C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ksohtml\wps2BD.tmp.png)
![](file:///C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ksohtml\wps2BE.tmp.png)
![](file:///C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ksohtml\wps2BF.tmp.png)
3. Use the function
to draw 2 lines connecting the above 3 arcs. Click
to trim the lines and arcs. After set constraint, we get figure 2.
![](file:///C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ksohtml\wps2C0.tmp.png)
![](file:///C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ksohtml\wps2C1.tmp.png)
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