Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 5 - Relationships Within Triangles - Chapter Review - Page 343: 21


An altitude is a perpendicular line segment drawn from the vertex of a triangle to a side opposite the vertex. $\overline{AB}$ is an altitude of the triangle because it is a perpendicular line segment that originates at vertex $A$ and contacts the side opposite vertex $A$.

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