SOLUTION: Points A, B, C, D, and E are coplanar and no three are collinear. In how many way can the plane be named using only these points?

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Question 482935: Points A, B, C, D, and E are coplanar and no three are collinear. In how many way can the plane be named using only these points?
Answer by richard1234(7193) About Me  (Show Source):
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Remember that three or more coplanar points uniquely determine a plane. We can choose three points, or even four or all five points. The number of ways to do so is 5C3 + 5C4 + 5C5 = 10 + 5 + 1 = 16 ways.