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Class 11MathematicsPermutations and CombinationsCombinationsExpert
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How many diagonals are there in a convex polygon with (18) sides?

Answer and explanation

Correct answer: (135)

The ways to choose two vertices are (^{18}C_{2}). Subtracting (18) sides gives (135) diagonals.

Related tags

PolygonDiagonalsCombinationsPermutations And CombinationsMathematicsClass 11 Mcq
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