Cardiod as envelope

Author:Zoltán Kovács

A cardioid given as the envelope of circles whose centers lie on a given circle and which pass through a fixed point on the given circle. See also Wikipedia.

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探究長方形對角線上的正方形數目
Conchoids of Nicomedes
Constructing the Perpendicular Line Through a Point Not on the Line
רישום חופשי
Mean Value Theorem

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Property of Kite
quadrelaterals tile the plane
Coding
Animation 214
גיליון דינאמי עבור בעיית קיצון מס 1

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Constructions
Secant Line or Secant
Hyperbola
LCM and GCD
Median Value