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A pentagon is the name for a fivesided polygon. However, there are different types of fivesided polygons, such as irregular, regular, concave and convex pentagons. More »
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 polygon can be any number of shapes. A polygon is a two dimensional shape made of at least 3 straight lines that do not cross and is a closed shape. Examples of polygons would include triangles, squares, rectangles, he... More »
To calculate the area of a regular pentagon, the perimeter of the polygon is multiplied by the apothem and the result is divided in half. The mathematical formula for the calculation is area = (apothem x perimeter)/2. More »
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 »
The name of a 10sided polygon is a decagon. The term "decagon" comes from the modern Latin word "decagonum" and from the Greek "dekagonon," which is a combination of "deka," meaning "ten" and "gonia," meaning "corner" o... More »
The name of a polygon with three sides is called a triangle. A foursided polygon is called a quadrilateral, a fivesided polygon is a called a pentagon and a sixsided polygon is called a hexagon. More »

US StandardsAligned
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