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The number of diagonals in a polygon of m sides is

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By Expert Faculty of Sri Chaitanya
a
12!m(m5)
b
12!m(m1)
c
12!m(m3)
d
12!m(m2)
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detailed solution

Correct option is C

Required number of diagonals

=mC2m=m(m1)2!m=m2!(m3)


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