Class 9 Ganita Manjari : Ch-1 Intro New NCERT (Orienting Yourself: The Use of Coordinates)

What is a Coordinate System🤔
A coordinate system is a structured framework-similar to the grid lines on graph paper-that uses numbers to precisely describe and define the exact physical locations of objects or points in space.

The Cartesian Plane:➕️
The system is built upon two perpendicular number lines that intersect at a central point called the origin (0, 0).

The X-axis: ↔️The horizontal number line. Values increase to the right and decrease to the left.

The Y-axis:↕️ The vertical number line. Values increase going upward and decrease going downward.

Quadrants: These two intersecting axes divide the entire plane into four distinct regions called quadrants, numbered counter-clockwise from the top-right.

Key Terminology:
​Abscissa: The x-coordinate of a point (how far left or right it is from the y-axis).
​Ordinate: The y-coordinate of a point (how far up or down it is from the x-axis).

Any point on the plane is written as an ordered pair: (x, y).

#CoordinateGeometry
#Geometry​#CartesianPlane
#introductiontocoordinategeometry
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