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The Vertical Angle Theorem
Author:
Gabriela Sanchez
GeoGebra
New Resources
Roman Numerals Bingo
Art and Rotational Symmetry
Flag in the wind
Rings of circles
Periodic Functions
Discover Resources
Explore trigonometry
Circle theorems
Reflection over Intersecting Lines
Transformations of Graphs
Philip Lloyd's notes and explanations
Discover Topics
Linear Regression
Matrices
Diagrams
Functions
Arithmetic Mean