Ask Question
3 April, 23:56

If a polygon has 189 diagonals how many sides does the polygon have?

+1
Answers (2)
  1. 4 April, 00:02
    0
    N (n-3) / 2=189

    n (n-3) = 378

    n^2-3n-378=0

    n=21
  2. 4 April, 00:19
    0
    (n take 2) minus n = 189

    n (n-3) / 2 = 189

    n (n-3) = 378

    n^2-3n-378 = 0

    n=21
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “If a polygon has 189 diagonals how many sides does the polygon have? ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers