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10.13 Angles in a Triangle
Author:
Daniel Ethier
Drag points B and C to change the triangle.
GeoGebra
Which angles always remain congruent? Why? What is the sum of angles DAC, CAB, and BAE? Why?
New Resources
Stairs (Optical Illusion)
"Compressed" Astroid as Envelope
Piano. Keyboard.
Viviani's Window
Teorema Japonês para quadriláteros inscritos em uma circunferência
Discover Resources
T-Test with two samples with different variance
Rhombus1514
WordARound
Quartic Function
Exploring Triangle Congruency Activity
Discover Topics
Division
Distributions
Rectangle
Normal Distribution
Trigonometric Functions