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Triangle Exterior Angle Theorem
Author:
William Richards
Move the vertices of the triangle to explore what happens to the angles.
GeoGebra
New Resources
Rotating Points (Optical Illusion)
Drag that Point!
Odd or Even
van Aubel's Theorem
Bottema's Theorem
Discover Resources
Congruency Test SAS
Roller Coaster 2
elmtv-807-1214d-2
Option 2
ကြေးမုံခွက်
Discover Topics
Matrices
Linear Equations
Kite
Similar Triangles
Rectangle