The curve generated by a point on the circumference of a circle, which rolls without slipping along outside of another circle is known as

In engineering graphics, a curve is a shape that results from cutting a cone with a cutting plane at different positions relative to the cone's axis. These curves are known as conic sections and include triangles, circles, ellipses, parabolas, and hyperbolas.  Engineering curves are useful in engineering because they represent the laws of nature on a graph. Here are some types of engineering curves: Ellipse: A curve that traces the sum of a point's distances from two fixed points in a plane. The fixed points are called foci, and the fixed line is called the directrix. Cycloid: A curve... Show more

In engineering graphics, a curve is a shape that results from cutting a cone with a cutting plane at different positions relative to the cone's axis. These curves are known as conic sections and include triangles, circles, ellipses, parabolas, and hyperbolas.  Engineering curves are useful in engineering because they represent the laws of nature on a graph.

Here are some types of engineering curves:

Ellipse: A curve that traces the sum of a point's distances from two fixed points in a plane. The fixed points are called foci, and the fixed line is called the directrix.
Cycloid: A curve generated by a point on the circumference of a circle rolling along a straight line without slipping. The rolling circle is called the generating circle, and the straight line is called the directing line or base line.

Parabola: A set of points in a plane that are equidistant from a straight line or directrix and focus.

Involute: A curve traced out by an end of a piece of thread unwound from a circle or a polygon, with the thread kept tight. It can also be defined as a curve traced out by a point in a straight line that rolls without slipping along a circle or a polygon. 

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