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SSAT Upper Level
Quantitative (Math)

Interior Angle of a Regular Decagon

Medium Geometry And Measurement Polygons

A polygon has 10 sides and is known as a decagon. If each interior angle of a regular decagon is measured in degrees, what is the measure of each interior angle?

To calculate the measure of each interior angle of a regular polygon, use the formula:

$I = \frac{(n-2) \times 180}{n}$

where $n$ is the number of sides.

Hint

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