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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
Sine and Cosine on the Unit Circle
bewijs stelling van Pythagoras
Graphs of Rational Expressions
Which Quadrilateral is Which?
Tangent Vector (2)
Discover Resources
brianna pawlak
picasso
Vertical Angle Exploration
Diverging Spherical Lens
The inverse of a quadratic function.
Discover Topics
Mode
Tangent Line or Tangent
Upper and Lower Sum or Riemann Sum
Random Variables
Congruence