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

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 twelves verties of a 12-sides regular polygon is -

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 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

Let T_(n) be the number of all possible triangles formed by joining vertices of an n - sided regular polygon . IF T_(n+1)-T _n=10 then the value of n is -

Let T_n be the number of all possible triangles formed by joining vertices of an n - sided regular polygon . If T_(n+1)-T_n=10 , then the value of n is :

Let T_(n) be the number of all possible triangles formed by joining vertices of an n-sided regular polygon. If T_(n+1)-T_(n)=19 then the value of n, is

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