Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10:
ISBN 13:

Chapter 2 - Section 2.4 - The Angles of a Triangle - Exercises - Page 94: 42

Answer

360$^{\circ}$

Work Step by Step

The sum of the angles within a triangle is 180$^{\circ}$. Since quadrilaterals are made up of two triangles, the sum of the angles within them is 360$^{\circ}$.
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