# how many diagonals does a nonagon have

Free e-mail watchdog. The nonagon, also known as an enneagon, is a 9-sided polygon. 3 4. 5. Still have questions? And we want to select 2 vertex, the fixed point and the point to which I … There are 17 diagonals. repeat this for n vertices. The number of diagonals of an n-sided polygon is: n(n − 3) / 2. 2 0. serious troll. In the figure on the right, the diagonal at the top of the polygon is outside the polygon's interior space. The number of diagonals in an n-gon is 2.5n. 5. It refers to both an attendee at a party at which "everybody in the party is a many-sided polygon" and a dance they perform at this party. Also by symmetry, EG and DH are parallel to AB. How many distinct diagonals does a hexagon have? How many diagonals does a nonagon have? The sum of angles of a nonagon is 1260°. Now that you have this, you can find how many diagonals there are in any n-sided polygon. But each will be counted twice, once at each vertex. HARD. Phillipe Put/CC-BY 2.0. 0. The value of n is. Relevance. 0 0. 7. 1 decade ago.