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# Find the number of triangles in a heptagon if drawn from a single vertex.

Given: A heptagon.

**To do: **To find the number of triangles in a heptagon if drawn from a single vertex.

**Solution:**

If a polygon has $n$ sides then,

Number of triangles in the polygon drawn from a single vertex$=n-2$

Here we have a heptagon, thus $n=7$.

$\therefore$ Number of triangles in a heptagon$=n-2=7-2=5$

Thus, there are $5$ triangles in a heptagon drawn from a single vertex.

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