Eduprobe
Question:
If in a regular polygon the number of diagonals is 54, then the number of sides of this polygon is?
12
9
10
6
Solution:
We know polygon having n sides will have n(n-3)/2 diagonals
→n(n-3)/2 = 54
→n(n-3) = 108
→n = 12
12
9
10
6
We know polygon having n sides will have n(n-3)/2 diagonals
→n(n-3)/2 = 54
→n(n-3) = 108
→n = 12