Orthocenter definitions

ôr'thō-sĕn'tər
The point of intersection of the three altitudes of a triangle.
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The point where the three altitudes of a triangle intersect.
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(geometry): the intersection of the three lines that can be drawn flowing from the three corners of a triangle to a point along the opposite side where each line intersects that side at a 90 degree angle; in an acute triangle, it is inside the triangle; in an obtuse triangle, it is outside the triangle.
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