How many diagonals does a polygon with 7 sides have?
Note
A diagonal joins two non-adjacent vertices. Use n(n − 3) ÷ 2; for 7 sides, that gives 14 diagonals.
How many diagonals does a polygon with 7 sides have?
A diagonal joins two non-adjacent vertices. Use n(n − 3) ÷ 2; for 7 sides, that gives 14 diagonals.