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Triangle Calculator

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The triangle is limited to lattice points in the range . Drag the points , , and to generate new triangles. Hover over lines and special points to get a popup with equations or values. The program calculates triangle centers:

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• incenter , the center of the incircle, where the angle bisectors intersect,

• centroid , where the medians intersect,

• circumcenter , the center of the circumcircle, where the perpendicular bisectors intersect, and

• orthocenter , where the altitudes intersect.

The points , , and are collinear.

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Contributed by: Ed Pegg Jr (July 2011)
Open content licensed under CC BY-NC-SA

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