Answer
acute
Work Step by Step
$7^{2}+8^{2}=9^{2}$
$49+64\ne81$
$113\ne81$
Thus, we deduce that the triangle is acute.
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 8 - Right Triangles and Trigonometry - 8-1 The Pythagorean Theorem and It's Converse - Got It? - Page 495: 5
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