# CBSE Class 11-science Answered

**How many triangles can be formed by joining any 3 of the 9 points when**

**i) no 3 of them are collinear?**

**ii) 5 of them are collinear?**

Asked by kandappan | 10 Feb, 2020, 05:34: PM

Expert Answer

i.

Number of triangles that can be formed by joining

any three of the 9 points when no three of them are collinear

=

ii.

Number of triangles that can be formed by joining

any three of the 9 points when 5 of them are collinear

Answered by Yasmeen Khan | 10 Feb, 2020, 05:51: PM

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