Septuagintagonal

Septuagintagonal refers to a shape or object that has seventy sides. In geometry, a septuagintagon is a polygon with 70 vertices and 70 edges. Like any polygon, it can be convex or concave. A regular septuagintagon has all sides of equal length and all interior angles equal. The sum of the interior angles of any septuagintagon, regardless of its regularity or convexity, is given by the formula (n-2) * 180 degrees, where n is the number of sides. For a septuagintagon, this sum is (70-2) * 180 = 68 * 180 = 12,240 degrees.

The measure of each interior angle in a regular septuagintagon is the total sum of interior angles divided by the number of sides, which is 12,240 / 70 = 174.857 degrees (approximately). The exterior angle of a regular septuagintagon is 360 / 70 degrees, which is approximately 5.143 degrees. The term "septuagintagonal" is not commonly encountered in everyday language, as polygons with such a large number of sides are rarely discussed outside of specialized mathematical contexts.