Question

How many right angled triangles can be drawn through 10 points on a circle?

Answer 1

Answer:

hope the answer is helpful

Step-by-step explanation:

All 10 points on the circle are non collinear.

For a triangle to be formed, we need 3 non collinear points.

Hence, the no. of triangles formed = the number ways we can select 3 points out of 10, which, by definition is

10C3= 10!/7!3!= 120.

Therefore, 120 triangles can be formed.

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