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Showing a triangles exterior angle is equal to its remote interior angle
Author:
Richard Vallejo
Topic:
Triangles
GeoGebra
New Resources
Angles and Intersecting Lines: Quick Investigation
Cross Product in 2D and 3D
Construct a Square
Simplifying Radicals: Geometric Thin Slice
Rotating Points (Optical Illusion)
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Sum and difference formulas
rotation selon distance
Similar Circles
And more unexpected conics...
sin(v+180)=-sin v , cos(v+180)=-cos v
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Terms
Power Functions
Quadratic Functions
Unit Circle
Algebra