Sum of the angles in a triangle

Animation outlining the proof that the sum of the angles in a triangle is 180°. A line is drawn through the top vertex of the triangle which is parallel to the base and then the alternate angles are shown.

 

GreenMaths

 
Resource Type
Activity
Tags
angle  angles  geometry  ireland  project-maths  sum  triangle 
Target Group (Age)
11 – 14
Language
English (United Kingdom)
 
 
GeoGebra version
4.2
Views
5239
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