How many triangles can be formed by joining vertices of decagon ? Find number of diagonals of a decagon .

How many triangles can be formed by joining 6 points lying on a circle ?

How many triangles can be formed by joining the angular points of a decagon ? How many diagonals will it have ?

How many different triangles can be formed by joining the angular point of a decagon .find also the number of diogonal of the decagon

How many different triangles can be formed by joining the angular points of a polygon of n side ?find also the number of diagonals of the polygon .

The number of triangles that can be formed by joining the vertices of a regular polygon of side n is denoted by T_(n) If T_(n+1)-T_(n)=21 then the value of n will be -

In how many ways can 6 boys form a ring ?

five points are given on one of two parallel straight lines and ten points are given on the other straight line. How many triangles can be formed by taking these points as vertices of a triangle ?

Let T_(n) denote the number of triangles which can be formed using the vertices of a regular polygon of n sides . If T_(n+1)-T_(n)=21 then find the values of n .

How many words can be formed from the letters of the word COMMITTEE?