Example Question - vertices in a square

Number of Triangles in a Square

The image shows a geometric shape, which appears to be a square (a regular quadrilateral). The question asks how many triangles are formed by drawing all the diagonals from a single vertex. In a square, there are two diagonals that can be drawn from any single vertex. Drawing both diagonals from one vertex, you divide the square into four triangles. So the answer to the question is four triangles are formed by drawing all the diagonals from a single vertex.