A polygon has 13 sides. How many triangles can be drawn using the vertices of the polygon?

Simple Solution:
Number of triangles formed using vertices of a polygon:

$= \binom{n}{3} = \frac{n(n-1)(n-2)}{6}$

Here $n = 13$

So,
$= \frac{13 \times 12 \times 11}{6}$

$= \frac{1716}{6} = 286$
Final Answer:
286