The number of rectangles that can be obtained by joining four of the twelves verties of a 12-sides regular polygon is -

The number of rectangles that can be obtained by joining four of the twelve vertices of a 12- sided regular polygon is 5K, then the value of K is

The number of rectangles that can be obtained by joining four of the twelve vertices of a 12 - sided regular polygon is :

The number of triangle that can be formed by joining the vertices of a regular polygon of n sides is

The number of triangles that can be formed using the vertices of a 20 sided regular polygon such that the triangle and the polygon does not have any side common is

The number of triangles that can be formed using the vertices of a 20 sided regular polygon such that the triangle and the polygon does not have any side common is

The name of three-sided regular polygon is __________.

" Total number of rectangles which can be formed using the vertices of "16" sided regular polygon is "

the name of a regular polygon of 3 sides is :

The number of triangles which can be formed by using the vertices of a regular polygon of (n + 3) sides is 220. Then n =