Find the sum of the interior angles (in degrees) of a polygon with 12 sides.

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NumericalSum of Interior Angles of a Polygon

The sum of the interior angles of an octagon is

The measure of each interior angle of a regular decagon is

Regular and Irregular Polygons

Sum of Interior Angles of a Polygon

The sum of the interior angles of a polygon is 1260°. How many sides does it have?

Each exterior angle of a regular polygon is 24°. Find the sum of its interior angles (in degrees).

Four angles of a hexagon are 115° each. The other two angles are equal. Find the measure of each of these two angles (in degrees).

The sum of the interior angles of a polygon is 4 times the sum of its exterior angles. How many sides does the polygon have?