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.
Know MoreThe sum of all the angles inside of any polygon drawn on a flat surface is 540 degrees. In a regular pentagon, each angle has 108 degrees. In other pentagons, an individual angle cannot be more than 540 degrees or less than 0 degrees. All regular pentagons have an area that can be calculated by multiplying the square of the length of an individual side by the constant 1.72.
Learn more about GeometryThe common endpoint of the sides of an angle is called a vertex. For example, triangles have three vertices, while squares have four. These common endpoints are often colloquially called corner points, though this may result in confusing them with angles.
Full Answer >In geometry, a shape with five sides is called a pentagon. A regular pentagon has five sides of equal length, as well as five equal angles. A standard "STOP" sign in the US is a regular pentagon, as is the Pentagon building in the District of Columbia.
Full Answer >A pentagon is a two-dimensional geometric figure that has five sides. A regular pentagon is one where all five sides are the exact same length and the internal angles are all 108 degrees.
Full Answer >According to the University of Washington math department, a regular pentagon has five obtuse angles. The sum of all angles for a regular pentagon is 540 degrees, making each angle 108 degrees. Any angle over 90 degrees is obtuse.
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