Constructions of polygons

Are these sound constructions for regular polygons? Why/ why not?
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Resource Type
Activity
Tags
constructions  polygons 
Target Group (Age)
15 – 18
Language
English (United Kingdom)
 
 
GeoGebra version
4.0
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2618
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License
CC-BY-SA, GeoGebra Terms of Use
 
 
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