How many edges does a nonagon have?

A nonagon is a nine-sided polygon. To calculate the number of edges in a nonagon, you can use the formula for the number of edges in any polygon, which is n(n-1)/2, where n is the number of sides. So, for a nonagon, you would have 9(9-1)/2 = 9(8)/2 = 72/2 = 36 edges.