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Altitudes of a triangle

An altitude of a triangle is a perpendicular line from a vertex to the opposite side (extended if necessary).

The three altitudes of a triangle (extended if necessary) meet at a single point called the  orthocenter of the triangle.

graphics/IE_altitude__2.png altitude.wmf


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


Bisectors

Law of cosines

Law of sines

Median

Pythagorean theorem

Similar triangles

Triangle


Copyright © 2006 Darel Hardy, Fred Richman, Carol Walker, Robert Wisner. All rights reserved. Except upon the express prior permission in writing, from the authors, no part of this work may be reproduced, transcribed, stored electronically, or transmitted in any form by any method.

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