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# Interior Angle Sum of Quadrilaterals

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##### Description:
1.

Demonstrate why the sum of the measures of the interior angles of any quadrilateral is 3600

2.

Provide examples that demonstrate how to use this theorem to solve for unknown variables and unknown angle measurements.

This packet should help a learner seeking to understand the sum of the interior angles of a quadrilateral.

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Tutorial

This video explains that the sum of the interior angles of a quadrilateral is always 360 degrees.

Source: RobertOB on Guaranteach

## Why 360 degrees?

One may ask, at this point, why the sum of the angles of a quadrilateral is 360 degrees. This is because any quadrilateral can be divided into two triangles, each of which, as we know, has angles that sum to 180 degrees. Thus, the total of all the angles in a quadrilateral is 360 degrees.

## Using the Interior Angle Sum of Quadrilaterals to Find Unknown Angles

Source: RobertOB on Guaranteach