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How many triangles can be formed by choosing (3) points from (14) points if no (3) points are collinear?

Answer and explanation

Correct answer: 364

A triangle is formed by selecting any 3 of the 14 points. Since no 3 points are collinear, every selected group of 3 points forms a triangle. Therefore, the number of triangles is \(\binom{14}{3}=\frac{14\times13\times12}{3\times2\times1}=364\). The value 1092 can result from an arrangement-based calculation, but the order of vertices does not matter for a triangle. Exam tip: use combinations when objects are selected and their order is irrelevant.

Related tags

CombinationsTrianglesNon-Collinear PointsClass 11Permutations And CombinationsMathematicsClass 11 Mcq

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