Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 5 - Section 5.3 - Proving Triangles Similar - Exercises - Page 230: 4b



Work Step by Step

For any two isosceles triangles to be similar, the vertex angles of the two triangles need to be congruent. For example: I could have one isosceles triangle with angle measures of $80^{\circ}, 50^{\circ}, 50^{\circ}$, and one isosceles triangle with angle measures of $90^{\circ}, 45^{\circ}, 45^{\circ}$. These two isosceles triangles are NOT similar.
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