A polygon is a plane figure that has "at least three straight sides and angles," according to Oxford Dictionaries. However, polygons can have more than three sides; most have five or more. More »

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 pentago... More »

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The number of sides a regular polygon has is indicated by the name of the polygon. For example, a pentagon has five sides, and an octagon has eight sides. The fewest number of sides a polygon can have is three, but there... More »

A heptagon is a figure or polygon that has seven angles and seven sides. The sum of these seven interior angles has to equal 900 degrees. More »

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A polygon with four sides and four angles is called a quadrilateral. Quadrilaterals are two-dimensional, closed shapes with angle measurements that add up to 360 degrees. More »

Unlike a regular shape, an irregular shape is a polygon with sides that aren't all equal and unequal angles. Some conventional geometric shapes, such as the rectangle, parallelogram and rhombus, are irregular. A rectangl... More »

The degrees of a polygon, or the sum of its angles, depends on the number of sides the polygon has. The sum of the degrees of the angles of a polygon equals 180(n-2), where n equals the number of sides of the polygon. More »