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© Copyright 2003, Jim Loy
These are the four main centers of a triangle [see Four Centers of a Triangle (part I) (a Cinderella demonstration) and The Centers of a Triangle (for more information)]. The line segment, with three of the centers on it, is the Euler line. The orthocenter is twice as far from the centroid as the circumcenter is. Move the two large red dots to see how the four centers move:
The above Java interactive demonstration was created with Cinderella (a geometry program).
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