Answer
So $\triangle RST$ is a Acute $\triangle$
Work Step by Step
In given $\triangle RST$
All angles are acute.
So $\triangle RST$ is a Acute $\triangle$
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 2 - Section 2.4 - The Angles of a Triangle - Exercises - Page 97: 10b
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