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7:02
YouTube
JoAnn's School
Geometry 5.3b, Altitude of a Triangle & finding the Orthocenter
An explanation of an altitude of a triangle as a perpendicular segment from a Vertex to the line containing the opposite side; how every triangle has three altitudes; how an altitude can be inside, outside, or on the triangle; how lines containing the altitudes are concurrent at a point; how the point of concurrency is the orthocenter of the ...
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