Orienting Yourself : The Use of Coordinates
CBSE · Class 9 · Mathematics
Summary of Orienting Yourself : The Use of Coordinates for CBSE Class 9 Mathematics. Key concepts, important points, and chapter overview.
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Overview
Coordinates provide a precise way to describe the position of a point using two numbers on a plane. The chapter builds the idea from a grid-like way of thinking, shows how the x-axis and y-axis locate points, explains quadrants and coordinate signs, and derives the distance formula using the Baudhāy
Key Concepts
A coordinate system is a structured
A coordinate system is a structured grid that uses numbers to describe exact locations of points or objects. It is like graph paper, where position is
The plane in which the axes
The plane in which the axes are situated is called the Cartesian plane, the coordinate plane, or the xy-plane. The horizontal line is the x-axis and t
The point of intersection of
The point of intersection of the x-axis and y-axis is called the origin O, and its coordinates are (0, 0).
In coordinates (x
In coordinates (x, y), x is the perpendicular distance of the point from the y-axis measured along the x-axis, and y is the perpendicular distance of
A point on the x
A point on the x-axis has coordinates of the form (x, 0), and a point on the y-axis has coordinates of the form (0, y). Distances to the right or upwa
Learning Objectives
- Understand the meaning of a coordinate system and the Cartesian plane
- Identify the x-axis, y-axis, and origin
- Locate points on the axes and in the four quadrants
- Use coordinate signs correctly in all quadrants
- Find the distance between points on axes and in the plane
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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