ClipArt ETC
A line moves in a plane and it therefore envelopes a plane curve.

Plane Curve

A line moves in a plane and it therefore envelopes a plane curve.

Illustration of a hyperbolic spiral, also called a reciprocal spiral, it is a transcendental plane curve. It is a type of Cotes' spiral and is the exact opposite of an Archimedean spiral.

Hyperbolic Spiral

Illustration of a hyperbolic spiral, also called a reciprocal spiral, it is a transcendental plane curve.…