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Q: A: ### Quick Answer

**A five-sided shape is called a pentagon.** In geometry, all two dimensional shapes are known as polygons, so it can also be referred to as a five-sided polygon.

There are two types of pentagon; regular and irregular. A regular pentagon has five sides of equal length.

An irregular pentagon has five sides of varying length. A regular pentagon will always have the same interior and exterior angles. The interior angle of a regular pentagon is 108 degrees and the exterior angle of a regular pentagon is 72 degrees. The total interior angles of a pentagon will always equal 540 degrees.

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- Q:
## How many angles does a pentagon have?

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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.Filed Under: - Q:
## How many triangles are in a pentagon?

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Full Answer >**Three triangles can be drawn inside a regular pentagon.**If the diagonals are drawn from any one vertex of the pentagon, the number of triangles formed is given by the formula n - 2, where “n” is the number of sides of the polygon.Filed Under: - Q:
## How do you find the area of a pentagon?

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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.Filed Under: - Q:
## How many vertices does a pentagon have?

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Full Answer >**A pentagon has five vertices.**In geometry, a vertex is the point of meeting of two or more straight lines. The term "vertex" comes from Latin and has the plural "vertices."Filed Under: