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GeoGebra Lesson
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GeoGebra Lesson
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Nine Point Circle
Author:
Esther Gruenhut
Topic:
Circle
Euler, Feuerbach, etc.
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And if that wasn't enough:
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Move point P to see what happens when you reflect the orthocenter through the points on the nine point circle.
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Discover Resources
Geometry Congruence
Funktionen approximieren
Graph Transformations: side-by-side
Lines tangent to a circle
Circles (Theorems)
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Geometric Mean
Standard Deviation
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Difference and Slope
Differential Equation