Answer
m$\angle$RST=28$^{\circ}$
Work Step by Step
Given:
support system of a bridge which has
AC=6ft
m$\angle$ABC=28$^{\circ}$
m$\angle$RST=m$\angle$ABC=28$^{\circ}$ because they are corresponding angles of congruent triangles
Elementary Geometry for College Students (6th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
9781285195698
ISBN 13:
978-1-28519-569-8
Chapter 3 - Section 3.2 - Corresponding Parts of Congruent Triangles - Exercises - Page 138: 36a
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