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# How many angles does a quadrilateral have?

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A quadrilateral has four angles. There are many different types of quadrilaterals, and each has a specific name based on the shape that is formed.

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A quadrilateral can be named based off of the lengths of the sides and what type of angles are formed in the interior. A square is a quadrilateral with four equal sides and all interior angles equaling 90 degrees each. A rectangle is a quadrilateral that has interior angles that each equal 90 degrees, but all sides are not the same length. A rhombus is a quadrilateral that has interior angles that are equal, but they are not 90 degrees. The sides are also all the same length.

## Related Questions

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A diagonal is a line between two vertices of a polygon that is also not a side of the polygon, and a quadrilateral is a four-sided polygon. Veritces are the points where sides of a polygon meet, and a polygon is an enclosed figure formed by three or more line segments. Using the diagonal formula n(n-3) / 2 where n is the number of sides, each quadrilateral has two diagonals.

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In general, a shape with four sides, whether they are equal or not, is called a quadrilateral. Another name for this type of shape is a tetragon.

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A regular quadrilateral is also called a square. Regular polygons are two-dimensional shapes in which all sides are of equal length and all angles are of equal breadth. A quadrilateral is any four-sided polygon. A square has four sides and four angles, all of equal size.