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Angles and Intersecting Lines: Quick Investigation

In this app below, construct a pair of intersecting lines. Then measure the 4 non-overlapping angles at which these lines intersect.

AFTER COMPLETING THE CONSTRUCTION ABOVE...

Select the MOVE tool Toolbar Image. Move any 1 (or more) of the 4 blue points around. What do you notice? Describe as best you can in your own words!

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