Each exterior angle is 360/21 = 17.1429 deg
so each interior angle is 180 - exterior angle = 162.8571 degrees.
Chat with our AI personalities
If it is a regular polygon then it will have 10 sides
Exterior angle regular polygon = 360° ÷ number of sides = 360° ÷ W Interior angle regular polygon = 180° - exterior angle regular polygon = 180° - (360° ÷ number of sides ) = 180° - (360° ÷ W)
The only regular polygon with an interior angle of 90 degrees is the square, which has four sides. Other polygons can have an interior angle of 90 degrees, but they would not be regular polygons.
A regular polygon with each interior angle measuring 120 degrees is a hexagon.
it is 4329