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nCr Definitions and Properties

The numbers o...

Question

The numbers of diagonals in a do-decagon will be__.

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Solution

We know, Number of diagonal of n sided polygon = $^{n} C_{2} - n$

Number of sides in dodecagon = 12

Number of diagonals = $^{12} C_{2} - 12 = 54$

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nCr Definitions and Properties

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