# Coordinate axes of Two dimensional Space

The two perpendicular bisecting number lines that split the space into four equal parts are called the coordinate axes of two dimensional space.

## Introduction

In two dimensional Cartesian coordinate system, two number lines are perpendicularly bisected at their middle point for splitting the space in two perpendicular directions. The two number lines are called the coordinate axes of two dimensional Cartesian coordinate system.

In Bi-dimensional space, each coordinate axis is expressed by a special name. Now, let’s learn about each coordinate axis for studying the two-dimensional Cartesian coordinate system in detail.

### x-axis

The horizontal number line in two dimensional Cartesian coordinate system is called $x$-axis.

### y-axis

The vertical number line in bi-dimensional Cartesian coordinate system is called $y$-axis.

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