Adjustable Triangle: Exterior angle

Use this manipulative triangle to practice calculating missing exterior angles. First try hiding only the exterior angle Next only showing two angles. Can you still find the missing angles? What rules do you need to know to work these out?
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adamgonza —

 
Resource Type
Activity
Tags
angle  calculate  degree  exterior-angle  triangle 
Target Group (Age)
11 – 14
Language
English (United Kingdom)
 
 
GeoGebra version
3.2
Views
1647
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License
CC-BY-SA, GeoGebra Terms of Use
 
 
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