Answer
45$^{\circ}$
Work Step by Step
The angle is 45$^{\circ}$ because it is an isosceles right triangle.
Elementary Geometry for College Students (6th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
9781285195698
ISBN 13:
978-1-28519-569-8
Chapter 5 - Section 5.5 - Special Right Triangles - Exercises - Page 248: 23
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