Curve (original) (raw)

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This is a line that curves.

A curve is a line that turns or bends. A curved line is never straight, and a curved surface is a surface that is never flat. Some curves can be drawn on paper, but some curves, like a helix, can only be seen in 3-D. A circle is a curve that can be described with the formula _x_2 + _y_2 = _r_2. x and y are used as in a Cartesian coordinate system, and r is the radius of the circle (distance from the center to the outside). Many other curves can also be described with a formula like that.

• ellipse
• parabola
• hyperbola

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