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?

 

adamgonza

 
Type de ressources
Activité
Balises
angle  calculate  degree  exterior-angle  triangle 
Tranche d'âges
11 – 14
Langue
English (United Kingdom)
 
 
Version GeoGebra
3.2
Vues
1766
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