Donald York – Resources – GeoGebra

Explore circumcenters, incenters, centroids and orthocenters
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Donald York
Distance from a Point to a Line
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Donald York
The Hinge Theorem
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Donald York
The Hinge Theorem
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Donald York
Centers of a Triangle
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Donald York
Angle Bisector Theorem
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Donald York
Perpendicular Bisector Theorem
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Donald York
Altitudes of a Triangle and the Orthocenter
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Donald York
Transversal and Angle Pairs Intro Sketch
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Donald York
Law of Sines Simulator
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Donald York