Answer
The point is in red in the attached diagram.
Work Step by Step
We extend the sides of the triangle opposite the acute angle as the book suggests. Recall, the orthocenter of a triangle is the intersection of the altitudes of the triangle.
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 7 - Section 7.2 - Concurrence of Lines - Exercises - Page 337: 19
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