0
( n x 180 ) - 360
where
n is the number of sides.
In other words,
take the number of sides or your polygon and multiply that by 180.
then, subtract 360 from that result.
that is your answer.
An octadecagon has 18 sides.
( 18 x 180 ) - 360 = 2880
The sum of the interior angles of an octadecagon is 2880 degrees.
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Continue Learning about Other Math
What is the sum of the interior angles of an octadecagon?
360
What is the sum of the angles of a 14-gon?
Sum of exterior angles: 360 degrees Sum of interior angles: 2160
What is the sum of two complementary angles?
The sum of two complementary angles is 90 degrees. The sum of two supplementary angles is 180 degrees.
Sum of exterior angles of polygon?
The sum of the exterior angles of a polygon is 360o.
What are two angles whose measures have a sum of 90?
Two angles with a sum of 90 are called complimentary angles.
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