To draw a perfect pentagon, a compass should be used and five equal lines should be drawn inside of a circle. A pentagon is a five-sided polygon with its internal angles totaling 540 degrees. More »

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Draw the design of 12 pentagrams from cardstock, cut the design out, fold along all the lines, then glue or tape the edges together where they meet. More »

Calculating the surface area of a pentagonal prism, especially one with irregular pentagons, can be a tricky, multi-step process. It requires a method of measuring edge lengths and angles and a calculator to add together... More »

Usually when a person refers to a "three-dimensional pentagon," he is referring to a regular dodecahedron. A dodecahedron is a solid made of 12 flat faces, and a regular dodecahedron is made of 12 regular pentagons. More »

A pentagon has five diagonals on the inside of the shape. The diagonals of any polygon can be calculated using the formula n*(n-3)/2, where "n" is the number of sides. In the case of a pentagon, which "n" will be 5, the ... More »

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 fi... 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 »