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

What Do You See? (2)
Pythagorean Theorem: Quick Illustrator
Linear Equation Graphs: Thin Slice
רישום חופשי
Slope Illustrator (2)

Discover Resources

探究圓周與直徑的關係
對角線上的正方形
Riemann Sums
SAS-2
การบวกจำนวนเต็ม
كتابة الكسور الاعتيادية في صورة كسور عشرية

Discover Topics

Translation
Plane Figures or Shapes
Fractions
Piecewise Functions
Numbers