1.

A convex polygon has 44 diagonals. Find the number of its sides.

Answer»

Answer:

If you are talking about an n-sided CONVEX polygon, then its number of diagonals are given by nC2 - n; and if

nC2 - n = 44 (given), then

½ n (n - 1) - n = 44

n^2 - n - 2 n = 88

n^2 - 3 n - 88 = 0

Solving the quadratic, we have

n^2 - 11 n + 8 n - 88 = 0

(n - 11) (n + 8) = 0

Since, n = -8 is not applicable, hence the polygon in QUESTION must have 11 number of sides to it.

Hope it helps



Discussion

No Comment Found

Related InterviewSolutions