Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 3 - Section 3.3 - Isosceles Triangles - Exercises - Page 153: 44

Answer

If both the base angles are bisected to form a new triangle then the base angles of the new triangle will be congruent because they are half of two congruent angles. Therefore the newly formed triangle will be isosceles because it has two congruent angles and therefore two congruent sides.

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