Triangle Angle-Sum Theorem Proof

Follow the construction protocol and then move any vertex to verify that the interior angles add to 180 degrees

 

Gregorio Lopez

 
Resource Type
Activity
Tags
angle-sum  proof  theorem  triangle 
Target Group (Age)
14 – 18
Language
English (United States)
 
 
GeoGebra version
4.4
Views
924
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