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Angle sum of triangle proof
Author:
Andy Greasley
GeoGebra
New Resources
Cross Product in 2D and 3D
Napoleon's Theorem
Pelecoid
Isosceles Triangle: Quick Construction
Angles and Intersecting Lines: Quick Investigation
Discover Resources
The Equidistance Theorem (Part 2)
Linear regression example 2
Mastery Check 1. Copy Angle Alondra salomon
Midsegment Theorem Proof by Transformations
Locating Proper and Improper Fractions on a Number Line
Discover Topics
Addition
Standard Deviation
Reflection
Linear Functions
Quadratic Equations