SOLUTION: pls help :) A.) nine points are placed on a circle. how many triangles can be formed using these points, three at a time, as verticies?

SOLUTION: pls help :) A.) nine points are placed on a circle. how many triangles can be formed using these points, three at a time, as verticies?

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Question 461715: pls help :)
A.) nine points are placed on a circle. how many triangles can be formed using these points, three at a time, as verticies?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
There are nine points and we want to choose three. The order we choose them in doesn't matter because it'll result in the same triangle regardless, so the answer is 9C3 = 84 triangles.
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