# Grid

In mathematics, a grid is a set of intersecting lines. It is widely used in mathematics for locating points, drawing figures, organizing data, and more.

The following are some examples of grids used in math.

## Coordinate systems

Coordinate systems often use grids to help with determining the position of points in a coordinate plane. In a rectangular coordinate plane, the grid is normally parallel to the x- and y- axis. Grids are also frequently used in the context of polar coordinate systems, maps, and other coordinate systems. The following are some examples.

## Graph paper

Graph paper, also called coordinate paper, squared paper, or grid paper, is paper printed with lines that make up a structure of regularly spaced, intersecting lines, that may be straight or curved. Graph paper is useful for plotting graphs and drawing curves.

Graph paper is available either as loose-leaf paper or bound in notebooks. The most common type of graph paper is printed with square grids of equal size. Log-log grid paper, polar coordinate paper, and many other types also exist.

## Other usages of grids in mathematics

Grids are also widely used in mathematics for organizing data or demonstrating a concept. The multiplication table and addition table below are two examples.

 × 1 2 3 4 5 6 7 8 9 1 1 2 3 4 5 6 7 8 9 2 2 4 6 8 10 12 14 16 18 3 3 6 9 12 15 18 21 24 27 4 4 8 12 16 20 24 28 32 36 5 5 10 15 20 25 30 35 40 45 6 6 12 18 24 30 36 42 48 54 7 7 14 21 28 35 42 49 56 63 8 8 16 24 32 40 48 56 64 72 9 9 18 27 36 45 54 63 72 81

 + 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 2 3 4 5 6 7 8 9 10 11 3 4 5 6 7 8 9 10 11 12 4 5 6 7 8 9 10 11 12 13 5 6 7 8 9 10 11 12 13 14 6 7 8 9 10 11 12 13 14 15 7 8 9 10 11 12 13 14 15 16 8 9 10 11 12 13 14 15 16 17 9 10 11 12 13 14 15 16 17 18