Getting the central area of a polygon is not possible. Probably the question refers to the central angle. In a a regular polygon, getting the central angle is that you need to use the formula.
Central Angle of a polygon = 360 degrees / number of sides of a polygon.
Why 360 degrees? Because, a circle has a total of 360 degrees. And a circle is a polygon with no sides.
Seven has the greatest value as a digit, but 1, 000 has the greatest standard form value.
What is 7x5x4, it is 140 so the volume is 140in^3 its a pretty simple problem