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Orienting Yourself : The Use of Coordinates — Revision Notes

CBSE · Class 9 · Mathematics

Orienting Yourself : The Use of Coordinates revision notes for CBSE Class 9 Mathematics: 2 topics in quick points.

89 questions80 flashcards6 formulas & key relations5 concepts

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Key Topics to Revise

1

4. Distance between two points in the plane

  • The Baudhāyana–Pythagoras Theorem helps find the distance between any two points in the xy-plane.
  • Triangle ADM is used as a worked example in the chapter.
  • For A = (3,4) and D = (7,1), the x-distance is 7 - 3 = 4 and the y-distance is 4 - 1 = 3.
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5. Historical development of coordinate ideas

  • Baudhāyana used East–West and North–South lines for geometric constructions and developed the Baudhāyana–Pythagoras Theorem.
  • Ujjayinī was described as the point marking the central longitude meridian from which all other locations were measured.
  • Ptolemy described latitudes and longitudes of thousands of locations, including Ozine (Ujjayinī).

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Full Notes

Key Concepts

A coordinate system is a structuredThe plane in which the axesThe point of intersection ofIn coordinates (xA point on the x

Frequently Asked Questions

What are the important topics in Orienting Yourself : The Use of Coordinates for CBSE Class 9 Mathematics?
Key topics in Orienting Yourself : The Use of Coordinates include Distance between two points in the plane, Historical development of coordinate ideas. Study these first, then practise questions on each for Class 9 exams.
How should I revise Orienting Yourself : The Use of Coordinates for Class 9 exams?
Learn the core ideas first, then work through the 89 practice questions on Orienting Yourself : The Use of Coordinates. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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