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 (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 4 - Review Exercises - Page 214: 20
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