A particular convex polygon with seven sides has exactly one right angle. How many diagonals does this seven-sided polygon have?
I know that a diagonal is a line segment that connects two non-adjacent vertices of a polygon. I also know that any n-sided polygon has n(n-3)/2 diagonals, regardless of the angles. So, to find the number of diagonals for this seven-sided polygon, I just need to plug in n = 7 into the formula and simplify. I get 7(7-3)/2 = 7(4)/2 = 14. So, the answer is 14 diagonals.

