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

函數的單調性
montecarlo circles 1
Slope Between 2 Points (Phase 2)
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רישום חופשי

Discover Resources

Untitled
Abacus
CCSS High School: Geometry (Challenges)
Huzita–Hatori Axiom 2

Discover Topics

Parabola
Plane Figures or Shapes
Means
Secant Line or Secant
Confidence Interval