# 2D Coordinate Geometry

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## Introduction

**2-dimensional coordinate geometry** involves assigning each and every point in 2-dimensional space with coordinates which can be uniquely used to identify the point. The coordinates are measured with respect to two mutually perpendicular reference lines, known as the coordinates axes.

## Coordinate axes and coordinates

The coordinate axes are commonly referred to as the \(x\)-axis and \(y\)-axis. The coordinates of the points are denoted as \( (a,b) ,\) where \( a \) is known as the \(x\)-coordinate or the abscissa. It is equal to the distance of the point from the \(y\)-axis (or vertical axis). \( b \) is known as the \(y\)-coordinate or the ordinate. It is equal to the distance of the point from the \(x\)-axis (or horizontal axis).

**Cite as:**2D Coordinate Geometry.

*Brilliant.org*. Retrieved from https://brilliant.org/wiki/2d-coordinate-geometry/