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

Damped Trochoidal Curve
Some random function
Rose Curve
Fourier Lissajous (Mechanical)
Cartesian vs Polar

Discover Resources

Rotating Triangle
Lab Investigation
Bài tập 3 trang 53
Upper and lower Riemann Sums
Rotational Speed vs. Linear Speed

Discover Topics

Power Functions
Numbers
Combinatorics
Statistical Characteristics
Circle