#### 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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Published by
Cengage

ISBN 10:
978-1-337-61408-5

ISBN 13:
978-1-33761-408-5

360$^{\circ}$

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