Question

No. of triangles that can be drawn by joining $10$ points on a circle is

• A. 240
• B. 360
• C. 120
• D. 180

Answer 1

The correct option is C 120

To draw a triangle we need minimum $3$ points.

Also if points are drawn on a circle, then we only need $3$ points to form a triangle

We have $10$ point, so number of triangles drawn is

${}^{10}{C}_3=120$