Signs of Coordinates

Here we will learn about the signs of coordinates.

$\overrightarrow{X'OX}$ and $\overrightarrow{Y'OY}$ represent the co-ordinate axes. The ray $\overrightarrow{OX}$ is taken as positive x-axis. So, any distance along $\overrightarrow{OX}$ will be taken as positive and the ray $\overrightarrow{OX'}$ is taken as negative x-axis. So, any distance move along $\overrightarrow{OX'}$ will be taken as negative.

Similarly, ray $\overrightarrow{OY}$ taken as positive y-axis. So, the distance moved along $\overrightarrow{OY}$ will be taken as positive and $\overrightarrow{OY'}$ is taken as negative y-axis. So, the distance moved along $\overrightarrow{OY'}$ will be taken as negative.

So, In Quadrant I, x > 0, y > 0 In Quadrant II, x < 0, y > 0 In Quadrant III, x < 0, y < 0 In Quadrant IV, x > 0, y < 0

The graph will help us to understand the convention of the signs of coordinates.

(i) The co-ordinates of any point lies in the first quadrant have both the abscissa and ordinate are positive i.e. (+, +).

(ii) The co-ordinates of any point lies in the second quadrant have the abscissa negative and ordinate positive i.e. (-, +).

(iii) The co-ordinates of any point lies in the third quadrant have both the abscissa and ordinate are negative i.e. (-, -).

(iv) The co-ordinates of any point lies in the fourth quadrant have the abscissa positive and ordinate negative i.e. (+, -).

Related Concepts:

● Coordinate Graph

● Ordered pair of a Coordinate System

● Plot Ordered Pairs

● Coordinates of a Point

● All Four Quadrants

● Find the Coordinates of a Point

● Coordinates of a Point in a Plane

● Plot Points on Co-ordinate Graph

● Graph of Linear Equation

● Simultaneous Equations Graphically

● Graphs of Simple Function

● Graph of Perimeter vs. Length of the Side of a Square

● Graph of Area vs. Side of a Square

● Graph of Simple Interest vs. Number of Years

● Graph of Distance vs. Time

7th Grade Math Problems

8th Grade Math Practice

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