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January 29, 2015

January 29, 2015

Posted by **please help** on Monday, January 14, 2013 at 8:18pm.

- geometry -
**Allyson**, Monday, January 14, 2013 at 8:20pmDraw a circle, form as many triangles as you can, and count.

- geometry -
**please help**, Monday, January 14, 2013 at 8:23pmok i tried that that its hard why dont u try and tellme the answer ?

- geometry -
**Reiny**, Monday, January 14, 2013 at 8:35pmYou have 6 points on a circle.

It is not possible to have 3 of them forming a straight line (not a triangle) so the question becomes how many choices are there of 3 elements form 6

or C(6,3) = 6!/(3!3!) = 20

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