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Euclid's Elements - Book III, Proposition 19
Author:
mtpberg
Topic:
Circle
A line drawn perpendicular to a tangent line at the point of tangency will pass through the center of the circle.
GeoGebra
New Resources
Droste effect
Flip Flop
alg2_05_05_04_applet_exp_fxn_flvs
Shade a spheric triangle with "surface".
alg2_05_05_01_slider_practice_flvs
Discover Resources
Angle at the Centre is Twice the Angle at the Circumference
MS p59 Q6
translation screen saver
demo 2
Apollonius by Inversion
Discover Topics
Piecewise Functions
Sine
Stochastic Process or Random Process
Statistical Characteristics
Similarity Transformation or Similarity