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Distance

Distance

One-page printable reference

See It in Action

Two examples of the idea done right—and one common look-alike that is not right.

EXAMPLE

EXAMPLE

NON-EXAMPLE

Definition

Distance refers to the length of the shortest path between two points.

More specifically:

  • The distance between two points on a flat surface (a plane) is measured as the length of the straight line connecting them.

  • In the coordinate plane, you can use the distance formula to calculate it:


The distance formula. The square root of open parentheses x two minus x one close parentheses squared plus open parentheses y two minus y one close parentheses squared.

  where (x1, y1) and (x2, y2) are the coordinates of the two points.

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Learn the whole picture

This term is one piece. Our courses build it into everything around it—short videos, practice, and the “why” behind every concept.

Algebra 1

Lines, slope, functions & more

Geometry

Shapes, proofs & spatial reasoning

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