The sum of internal angles of a shape is given by the equation 180(n-2) where n is the number of sides. For a pentagon, which has 5 sides, this would be 180x3 = 540. The sum of external angles of a shape is given by (180-(x/n))n where n is the number of sides and x is the sum of internal angles. For a pentagon, this would be 5x(180-540/5) = 360
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No, the internal angles of a simple pentagon sum to 540 degrees. See: http://en.wikipedia.org/wiki/Pentagon
The 4 interior angles add up to 360 degrees
It was the Pentagon.
45deg/360deg = 1/8
A pentagon has 5 edges A hexagon has 6 edges A septagon has 7 edges