How many diagonals does a polygon with 5 sides have?
Note
A diagonal joins two non-adjacent vertices. Use n(n − 3) ÷ 2; for 5 sides, that gives 5 diagonals.
How many diagonals does a polygon with 5 sides have?
A diagonal joins two non-adjacent vertices. Use n(n − 3) ÷ 2; for 5 sides, that gives 5 diagonals.