A nonagon is composed of nine straight sides and nine edges (or angles).
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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.
nonagon
A nonagon is nine sided. So, the base would have 9 sides and each face would be triangle. 18 edges would be my answer.
A Nonagon has 9 sides