A decagon is a polygon that has 10 sides. Decagons can be both regular polygons, which have sides of equal length and equal interior angles between each side, or irregular polygons, which have unequal sides and angles between sides.
Know MoreAll the interior angles of a regular decagon add up to 1,440 degrees. The formula to find the value of an interior angle of a regular polygon is (180n-360)/n, with n being the number of sides. Using 10 as n, this formula shows that a regular decagon has interior angles of 144 degrees, making the exterior angles measure 36 degrees each.
Learn more about GeometryAn 11-sided polygon is called a hendecagon. It is also known as the undecagon or unidecagon. However, the term "hendecagon" takes precedence over these variants because of its consistency in using a Greek prefix and suffix, instead of combining a Roman prefix with a Greek suffix.
Full Answer >A polygon with five sides is called a pentagon. In Greek, "pente" means "five." When math textbooks discuss pentagons, they are typically referring to a polygon with five equal sides, otherwise known as a regular pentagon.
Full Answer >A 10-sided polygon is referred to as a decagon. "Deca" is used as a prefix that means 10, and it is used to create compound words.
Full Answer >A 10-sided polygon is known as a decagon. A polygon is a closed plane figure with many sides that connect at its endpoints. Two sides meet to form a vertex, and the sides never cross each other.
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