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?

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seo tool
Navigation bar for geometric constructions
Graph that Function
z`]]
Derivative of Vector Functions

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Examples
spring-deflectionPC
Test
Gato Cartesiano
Perpendicular Bisectors
Hyperbola 2

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Percentages
Quadrilaterals
Constructions
Fractal Geometry
Division