# What is the difference between a quadrilateral and a polygon?

A quadrilateral is a polygon with

The digon (which has two sides) is not very meaningful in ordinary Euclidean plane geometry. It is more meaningful in the context of non-Euclidean geometries, such as elliptical or spherical geometry.

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A quadrilateral is a specific type of polygon. A polygon is a closed plane figure formed by three or more line segments called sides. A quadrilateral is a polygon with four sides and four vertices. Therefore, all quadrilaterals are polygons, but not all polygons are quadrilaterals.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- Two rhombuses have sides with lengths of #2 #. If one rhombus has a corner with an angle of #pi/12 # and the other has a corner with an angle of #(7pi)/12 #, what is the difference between the areas of the rhombuses?
- Why is a square a parallelogram?
- A parallelogram has sides A, B, C, and D. Sides A and B have a length of #6 # and sides C and D have a length of # 8 #. If the angle between sides A and C is #pi/3 #, what is the area of the parallelogram?
- A parallelogram has sides A, B, C, and D. Sides A and B have a length of #7 # and sides C and D have a length of # 5 #. If the angle between sides A and C is #(7 pi)/18 #, what is the area of the parallelogram?
- A parallelogram has sides with lengths of #18 # and #4 #. If the parallelogram's area is #27 #, what is the length of its longest diagonal?

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