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The double angle formulae
Author:
Integral Resources
Topic:
Angles
The circle has radius 1 and centre at O. Drag the point D and compare - the two expressions for the length DE - the two expression for the length OE.
GeoGebra
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Circle Passing Through 3 Points
apec
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Exploring GeoGebra for the First Time
Untitled
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Berechnung der Turmhöhe
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Circumcenter (& Questions)
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