Answer
The two sets are disjoint.
Work Step by Step
If a triangle is right, it can never be obtuse, and vice versa.
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 151: 11
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