SOLUTION: find the sum of number of sides and number of diagnol of a hexagon using permutation & combination

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Question 936916: find the sum of number of sides and number of diagnol of a hexagon
using permutation & combination
Answer by srinivas.g(540) About Me  (Show Source):
You can put this solution on YOUR website!
no of sides of hexagon = 6
no of diagonal = c(6,2)-6
c(6,2)= +%286%2A5%29%2F%282%2A1%29
= 15
no of diagonals = 15 -6 = 9
sum of number of sides and number of diagnol = 6+9 = 15