Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 8 - Right Triangles and Trigonometry - Common Core Cumulative Standards Review - Selected Response - Page 538: 2



Work Step by Step

An isosceles triangle has two sides that are of the same length. An equilateral has all congruent sides. The base angles of this isosceles triangle are congruent. Therefore, $\angle A$ is congruent to $\angle B$. However, we don't know anything about the measures of any of the angles. So we can only conclude that this triangle is an isosceles triangle. The answer is option $G$.
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