Interior angles add up to 540.
Exterior angles add up to 360.
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the angle sum of a pentagon is 540.
The sum of the exterior angles of a pentagon add up to 360 degrees.
It's 540 degrees for any pentagon, regular or not.
The sum of the internal angles of a pentagon is 540 degrees.
The sum of a pentagon's interior angles is 540 degrees.sum of them is 540 degresseach angle is 180 degrees