Answer
14.9 cm
Work Step by Step
Theorem 4.4.3: The length of the median of a trapezoid equals one-half the sum of the lengths of the two bases.
$12.3+17.5=29.8\div2=14.9$
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter 4 - Review Exercises - Page 217: 20
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