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Orthocenter of a Triangle

Orthocenter of a triangle

1. Create the altitude from each vertex of the triangle. The altitude is the segment from a vertex perpendicular to the opposite side. Sometimes, the altitude may be outside the triangle. Note that the altitudes intersect in a single point. Label this point O. Point O is the orthocenter of the triangle.

Properties of the orthocenter.

What are some of the properties of the orthocenter of a triangle?