Help: How to move C and E to A

How may I move point C and E to A without loosing the current restrictions (E is limited to the line CD, and C is limited to AB). I want to do this by commands (button) .

 

Rodland

 
Material Type
Activity
Tags
help  commands  button 
Target Group (Age)
19+
Language
English (United Kingdom)
 
 
GeoGebra version
4.2
Views
905
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