Google Classroom
GeoGebraGeoGebra Classroom

GoGeometry Action 170!

Creation of this resource was inspired by a problem posted by Antonio Gutierrez. You can move the LARGE WHITE POINTS anywhere you'd like at any time. Key Questions: 1) What is the EXACT MEASURE of the PINK ANGLE? 2) Suppose we didn't see the green triangle appear. How can we prove that this pink angle has this given measure?

Quick (Silent) Demo