David Richeson – 資源 – GeoGebra

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Final Grade Calculator: MATH 481 (Spring 2026)
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David Richeson
Gear Train Example
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David Richeson
Cardioid, nephroid, and moving light source
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David Richeson
Herschel's Enneahedron
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David Richeson
The Cross Product
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David Richeson
The Inverse of a Parabola is a Cardioid
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David Richeson
Cardioid from a Rolling Circle in Two Ways
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David Richeson
A Cardioid from a Family of Parabolas
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David Richeson
Cardioid as the Conchoid of a Circle
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David Richeson
The Evolute of a Cardioid
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David Richeson
The Involute of a Cardioid
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David Richeson
The Cardioid as a Pedal Curve
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David Richeson
The envelope of lines form an ellipse
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David Richeson
Planets, stars, and planetary orbits
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David Richeson
Simson Line
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David Richeson
Homotopy: Boy's surface to the Roman Surface
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David Richeson
Why is there a heart at the bottom of my coffee mug?
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David Richeson
nephroid reflection
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David Richeson
Congruent triangles and reflections
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David Richeson
Three reflections is a reflection or a glide reflection
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David Richeson
Two reflections is a translation or a rotation
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David Richeson
Impossible triangle 2—line up the dots
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David Richeson
Impossible triangle—line up the dots
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David Richeson
Billiard circuits in quadrilaterals
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David Richeson