Answer
x=60$^{\circ}$
$\angle$RST=30$^{\circ}$
Work Step by Step
$\angle$RST+$\angle$TSV=$\angle$RSV
$\frac{x}{2}$+$\frac{x}{4}$=45$^{\circ}$
3x=180$^{\circ}$
x=60$^{\circ}$
$\angle$RST=$\frac{60^{\circ}}{2}$=30$^{\circ}$
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 1 - Section 1.4 - Angles and Their Relationships - Exercises - Page 38: 21
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