Answer
AB=6+6$\sqrt 3$$\approx$16.39
Work Step by Step
Draw an altitude from point C to a point on AB that we'll name M.
2CM=BC
2CM=12
CM=6
MB=CM$\sqrt 3$
MB=6$\sqrt 3$
AM=CM
AM=6
AB=AM+MB
AB=6+6$\sqrt 3$$\approx$16.39
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 5 - Section 5.5 - Special Right Triangles - Exercises - Page 259: 33
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