Line -- from Wolfram MathWorld

A line is a straight one-dimensional figure having no thickness and extending infinitely in both directions. A line is sometimes called a straight line or, more archaically, a right line (Casey 1893), to emphasize that it has no "wiggles" anywhere along its length. While lines are intrinsically one-dimensional objects, they may be embedded in higher dimensional spaces. Harary (1994) called an edge of a graph a "line." A line is uniquely determined by two points, and the

Wolfram Math World: Descartes' Sign Rule Handout for 9th - 10th Grade

What is Wolfram MathWorld? Is it useful in solving math problems? - Quora

Parallelian -- from Wolfram MathWorld

Line-Line Angle -- from Wolfram MathWorld

Line -- from Wolfram MathWorld

Petersen Graph -- from Wolfram MathWorld Graphing, Geometric drawing, Line graphs

Line -- from Wolfram MathWorld

Line -- from Wolfram MathWorld

Line -- from Wolfram MathWorld