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Annulus

Author:René Schelldorfer

Prove that the area of the annulus remains the same!

New Resources

Reflection across a line
z`]]
רישום חופשי
Locus Related to Descartes' Folium
Triangle with 3 Right Angles

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Incenter
Trasformation
Tangent from External Point
Tangent Chord Angle
Spiral tools with halfcircles (Matthis, GER)

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Multiplication
Numbers
Orthocenter
Cuboid
Piecewise Functions

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