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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?
GeoGebra
New Resources
Rotating Points (Optical Illusion)
Stairs (Optical Illusion)
"Compressed" Astroid as Envelope
Viviani's Window
Slope of a Straight Line: Run and Rise
Discover Resources
Untitled
test
Rotating Mario 360
Book Graph Point Slope
Note
Discover Topics
Derivative
Unit Circle
Root
Pie Chart or Circle Chart
Similarity Transformation or Similarity