One term used for a 3D pentagon is a shape called a pentagonal prism. According to Reference.com, this is the polygon that results when you take a pentagon, transcribe a copy of it, and connect the two pentagons using five quadrilateral faces.
Know MoreThe pentagonal prism should not be confused with a pentahedron, which is a 3D polyhedron with five faces. An example of a pentahedron would be a triangular prism – two triangles and three quadrilaterals.
A pentagonal prism is a kind of heptahedron because it has seven faces – two pentagons and five quadrilaterals. Additionally, a pentagonal prism has 15 edges and 10 vertices.
Learn more about ShapesIn geometry, a shape, or polygon, with eight sides is called an octagon. A common example of an octagon in the real world is the stop sign. The octagon is also used in architecture, and umbrellas often come in an octagonal shape.
Full Answer >A parallelogram is a shape that has two pairs of parallel sides. There are three different types of parallelograms: rhombus, square and rectangle.
Full Answer >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.
Full Answer >A pentagon has five sides and five interior angles which add up to a total of 540 degrees. To determine the number of degrees of the interior angles in a pentagon requires subtracting two from the number of sides (five) and multiplying by 180.
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