GoGeometry Action 28! (Quick Angle Problem)

Author:Tim Brzezinski

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

New Resources

General Polar Equation of Conics with Rotation (2)
רישום חופשי
Open Education 2026
Tracing an Ellipse Using Two Circles
巧算長方形周界

Discover Resources

Constraints
สำรวจ4
Translations
Inscribed Angle

Discover Topics

Trigonometric Functions
Surface
Translation
Linear Equations
Exponent