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The Wallace-Simson Line
Author:
Steve Phelps
When the pedal point P is on the circumcircle of triangle ABC, the pedal triangle degenerates into a line through points D, E, and F. Click on the small "play" icon in the lower left corner.
GeoGebra
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Experiments with Transformations in the Plane
Roll 6d five times
apec
רישום חופשי
以竹簽拼砌三角形
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Bar Model for Problems on Ratio Rate Direct Proportion
Intro to Geometry
Surface Area
polar ဖြင့်နှလုံးသားပုံဆွဲသားခြင်း
im.g.1.18.3.Quilt Four 4-square Blocks, twice
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Real Numbers
Constructions
Square
Cosine
Inequalities