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# What is a curved line?

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According to Dictionary.com, a curved line is a type of line that continuously bends without any angles. In the United States, the curve is often portrayed as a central angle measured using degrees.

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Credit: Enrique Díaz / 7cero Moment Open Getty Images

The word “curve” comes from Middle French. The Latin word curvus means curved, bent or crooked. Related forms of the word curved include: curv-ed-ly as an adverb, curv-ed-ness as a noun, curve-less or un-curved as an adjective. A curved line does not have straight parts, and the line continues in a bending fashion. Objects that curve include bends in a road or the contour of a human body.

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## Related Questions

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To calculate the gradient of a line, divide the change in height between the beginning and end of the line by the change in its horizontal distance. Arguably the easiest way to do this is to plot the line on a pair of axes. For example, if a line started at (0,0) and ended at (4,4), its change in height would equal 4, and the change in horizontal distance would also equal 4. Divide 4 by 4 to get 1; therefore, the gradient of the line would equal 1.

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The midpoint of a line is found by adding up either the "x" coordinates or the "y" coordinates, then dividing them by two. A midpoint is halfway between two end points on a line.

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Slope is the angle at which a line differs from the horizontal. On a coordinate plane, slope is defined as change in y, divided by change in x, also known as rise over run.