Simson-Wallace variation

Auteur :M. Pilar Vélez

Construct a triangle ABC and free point D. Consider the perpendicular lines to DA, DB and DC. Ask for the locus of D so that these perpendicular lines are concurrent.

Simson-Wallace variation (M. de Guzman's book, pp45)

Nouvelles ressources

Astroid
Graphing a Circle in Polar Coordinates
Simple example: Colored circle
Graphing 1 + cos(theta) in Polar Coordinates
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Arc capabil de un unghi dat.
ResetGGB2
reflective writing
Silder 3D
rapports égaux
مفهوم النهاية

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Translation
PPCM et PGCD
Equation Différentielle
Rectangle
Hyberbole