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GoGeometry Action 59!
Author:
Tim Brzezinski
Topic:
Parallelogram
,
Quadrilaterals
Creation of this applet was inspired by a
post
from Antonio Gutierrez (
GoGeometry
). Feel free to move any of the BIG POINTS anywhere you'd like.
How can we formally prove what this applet informally illustrates?
GeoGebra
Quick (Silent) Demo
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