Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 7 - Review Exercises - Page 348: 20

Answer

The orthocenter is the intersection of the three altitudes of the triangle. Here, point $D$

Work Step by Step

An altitude of a triangle passes through a vertex and meets the other side in right angle. Here, an altitude passes through $A$ and meets $BC$ in right angle.
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