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

Let's fly!
Tube moving at distance of a curve.
Untitled
Constructing an Inscribed Equilateral Triangle + Activities
רישום חופשי

Discover Resources

hit the target
Polynomial Investigation 2nd Degree
L1_06
Windmill Pablov

Discover Topics

Geometric Mean
Rotation
Conic Sections
Sphere
Isosceles Triangles