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Reference Angles and Triangles
Author:
Ashley Coon
,
Scott Farrar
Drag P. Blue = Standard Angle, Red = Reference Angle.
GeoGebra
What is a reference angle? / Why do we use them?
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Dissections by Guillermo Bautista
Poorly Drawn Parallelograms 3
alg2_05_05_01_applet_exp_2_flvs
Poorly Drawn Parallelograms 2
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