nonacontagonal

Nonacontagonal refers to something having 90 sides. This term is most commonly used in geometry to describe polygons. A nonacontagon is a polygon with 90 vertices and 90 edges.

In the context of regular polygons, a regular nonacontagon has all sides equal in length and all interior angles equal. The measure of each interior angle in a regular nonacontagon can be calculated using the formula (n-2) * 180 / n, where n is the number of sides. For a nonacontagon, this is (90-2) * 180 / 90, which simplifies to 88 * 180 / 90, resulting in 176 degrees. The sum of the exterior angles of any convex polygon, including a nonacontagon, is always 360 degrees. For a regular nonacontagon, each exterior angle measures 360 / 90, which is 4 degrees.

The term nonacontagonal can also be used in other contexts, although less frequently. For example, it could refer to a shape or structure that is composed of 90 elements arranged in a polygonal fashion, or a property that is related to the number 90 in a geometrical sense. However, its primary and most precise application remains within the field of geometry concerning polygons.