Exterior angle of a triangle

- Drag the vertices A, B, C to create different types of triangles. - Use the sliders to create copies of the same triangle and prove that the external angle of a triangle is always equal to the sum of the two interior opposite angles.

 

mrsK

 
Materialetype
Arbejdsark
Tags
angle  angles  exterior-angle  geometry  theorem  triangles 
Målgruppe (alder)
8 – 18
Sprog
English (Australia)
 
 
GeoGebra version
4.4
Visninger
2727
Kontakt forfatteren til ressourcen
 
 
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