Answer
Start with a 90 degree angle in pencil. Cutting this angle in half with a bisector, you can make the red 45 degree angle. Then, adding a 15 degree slice to this angle, you can create the 105 degree angle.
Work Step by Step
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 3 - Section 3.4 - Basic Constructions Justified - Exercises - Page 158: 18
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