Question

The number of triangles are _____ less than the number of sides formed by the diagonals from one vertex.

• A. 3
• B. 5
• C. 8
• D. 2

Answer 1

Answer: (D)

2

The triangles are drawn by drawing diagonals one vertex to all others.

There would not be any diagonal drawn back to itself.

So, it is $2$ less. (angle sum property of polygons)
Therefore, D is the correct answer.