Each Interior Angle of a Regular Polygon

Each interior angle of a regular polygon of sides n is
(n-2)×(180/n) degree

Example. Measure the value of each interior angle of a regular hexagon.

Sol.  Number of sides of a hexagon is 6
         Therefore     (6-2)×(180/6)
                              = 4×30
                              = 120

Each Exterior Angle Of A Regular Polygon

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