Polygons are classified according to the number of sides.

The number of diagonals of a convex polygon is 15 less than 4 times the number of its sides. The number of sides of the polygon be

Two regular polygon are such that the ratio between their number of sides is 1:2 and the ratio of measures of their interior angles is 3:4. Find the number of sides of each polygon.

In a polygon the number of diagonals is 54. the number of sides of the polygon, is

r -sided polygons are formed by joining the vertices of an n -sided polygon.Find the number of polygons that can be formed,none of whose sides coincide with those of the n - sided polygon.

A polygon has 44 diagonals , then the number of its sides is