# Revision Notes For CBSE Class 9 Math Chapter -3 Coordinate Geometry

A coordinate geometry can be simply defined as a branch of geometry, where the position of the points on the plane is defined with the help of an ordered pair of numbers known as coordinates.

In the coordinate system, a coordinate graph contains a rectangular grid with two coordinate lines called as axes. The horizontal position is represented by X -coordinate and its vertical position is represented by Y- coordinate. They are typically written as an ordered pair (X, Y).

Listed below are some applications or uses of the coordinate geometry.

Coordinate Geometry is mainly used for:

• Calculating the distance between the two given points.
• To describe the equations of different geometric figures.
• Finding the equation, midpoint, or slope of a line segment.
• For calculating the area and the perimeter of a given polygon.
• To conclude the given set of lines are parallel or perpendicular.

## Frequently asked Questions on CBSE Class 9 Maths Notes Chapter 3: Coordinate Geometry

### What are â€˜Geometric figuresâ€™?

Geometric shapes are the figures which demonstrate the shape of the objects we see in our everyday life.

### What are the uses of â€˜Parallel linesâ€™?

The parallel lines help us understand where the objects and sides of different shapes are going.

### What is an â€˜Ordered pairâ€™?

An ordered pair is a composition of the x coordinate (abscissa) and the y coordinate (ordinate), having two values written in a fixed order within parentheses.