GoGeometry Action 28! (Quick Angle Problem)

Autor: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?

Nuevos recursos

Steel Chair
Sine and Cosine on the Unit Circle
Graphs of Rational Expressions
Slope Between 2 Points (Phase 2)
Transforming Random Variables

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Vertical Hyperbola Exploration
Paraboloide_3D
Teorema Bisectoare Exterioară.
Transfromation Task 2
Катков Приклад 6

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Área
Coseno
Vectores
Cuadrado
Ángulos