Question

Find the maximum number of diagonals that can be drawn in a decagon
using the formula.
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Answer 1

Answer:

Put n=10 we get 10*7/2=35 diagonals. A decagon has 10 vertices. Thus C(10,2)=10*9/2=45 lines can be drawn out which includes 10 sides. Hence number of diagonals of a decagon=45–10=35.

Answer 2

Answer:

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