GoGeometry Action 53!

Topic:Angles, Incircle or Inscribed Circle, Right Triangles

Creation of this applet was inspired by a tweet from Antonio Gutierrez. What is the measure of the blue angle? How can we formally prove this true?

Quick (Silent) Demo

New Resources

Limaçons
רישום חופשי
bewijs stelling van Pythagoras
Sum of Squares: Proof without Words
Rolling a Square

Discover Resources

Distance Formula
Effect of anisotropy on flow directions (3D)
ဒီစီလျှပ်စစ်မော်တာပုံစံငယ်
Spherical Coordinates

Discover Topics

Area
Subtraction
Normal Distribution
Step Functions
Integers