GeoGebra
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GeoGebra
External angle theorm of a triangle
Author:
ITfC-Edu-Team
Topic:
Angles
Related Topics
Congruence
Conic Sections
Constructions
Coordinates
Fractal Geometry
Discover Resources
Showing Corresponding Angles
Circle theorems with proofs
hexagon
Linear Design
Understanding Perimeter
Discover Topics
Equilateral Triangles
Logic
Pythagoras or Pythagorean Theorem
Plane Figures or Shapes
Arithmetic