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Theorem 4: angle at centre twice angle on circumference
Author:
Graham Burnby-Crouch
GeoGebra
New Resources
Linear Cross Section Exercise
Angles and Intersecting Lines: Quick Investigation
Bottema's Theorem
Slope Field (1)
"Compressed" Astroid as Envelope
Discover Resources
Cosine Rule (with proof)
Graphical and numerical CAS solution of a system of two equations with implicit functions (2)
HappyFace
ALLEN_Equilateral Triangle
Idea of Confidence Intervals
Discover Topics
Trigonometric Functions
Median Line
Multiplication
Congruence
Quadratic Equations