Answer
The bisector of the vertex angle of an isosceles triangle bisects the base because it splits the triangle into two congruent triangles that meet to form right angles.
Work Step by Step
Refer to theorem 3.3.2.
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 3.3 - Isosceles Triangles - Exercises - Page 153: 43
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