Q:

How many sides does a pentagon have?

A:

A pentagon is a two-dimensional geometric figure that has five sides. A regular pentagon is one where all five sides are the exact same length and the internal angles are all 108 degrees.

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In addition to having five sides, the sides must also form a closed shape. Sides also must be straight. Pentagons can be regular or irregular. An irregular pentagon refers to any pentagon where all sides are not equal, which consequently means that their angles are not equal, either. Other closely related shapes to pentagons include four-sided shapes, quadrilaterals, and six-sided shapes, which are called hexagons.

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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.

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A square pyramid, a pyramid with four triangular sides and one square side, is a figure with five faces, eight edges and five vertices. It is a kind of three-dimensional solid. The pyramids at Giza, Egypt are examples of such a figure.

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A rhombus is an equilateral parallelogram, which is a two-dimensional, four-sided figure in which opposite sides are parallel and all sides have equal length. A square fits this definition. However, it is usually considered a special case, and some definitions of a rhombus specify that squares are not included.