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January 30, 2015

January 30, 2015

Posted by **gorav** on Thursday, March 20, 2014 at 1:40am.

- geometry -
**Steve**, Thursday, March 20, 2014 at 5:19amif two of the points are a diameter apart, the triangle is a right triangle.

So, given that the first two points are on the same semi-circle, which they must be, then we want the probability that the third point is on the same semi-circle. If it is not, then the triangle will be acute, as all three arcs are less than 180 degrees.

So P = 1/2

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