Search the Community
Showing results for tags 'circle'.
-
Q. n points are equally spaced on a circle, where n is an even number greater than 3. If 3 of the n points are to be chosen at random, what is the probability that a triangle having the 3 points chosen as vertices will be a right triangle? This problem was posted in the Math Challenge section of MGRE. My solution is 3 / (n-1). Can anybody confirm the answer please ?
-
Dear all, there is a chance that this question came up already, but a search on the key terms does not find it. So here's the question. It is from readyforGRE.com's website (Advanced GRE math questions) [ATTACH=CONFIG]5849[/ATTACH] Could you help me explain the solution? I've tried using sin/cos ratios, that didn't help. Tried looking for special triangles (I think it's something close to this, but no success). I have a feeling that I need to use the fact that these triangles share the same angle at the top, but again... no clue on how to proceed. Many thanks!