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Syllabus

A Tale of Three Intersecting Lines — Syllabus

CBSE · Class 7 · Mathematics

What A Tale of Three Intersecting Lines covers in CBSE Class 7 Mathematics: 4 topics, for the 2026-27 session.

42 questions64 flashcards4 formulas & key relations5 concepts

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4 Topics · CBSE Class 7 Mathematics · 2026-27

Topics in A Tale of Three Intersecting Lines

1

1. Basics of a Triangle

  • A triangle has three vertices and three sides joining pairs of vertices.
  • The three sides meeting at the corners form three angles.
  • A triangle can be named by its vertices, and the vertices may be written in any order.
2

2. Equilateral and Isosceles Triangles

  • Equilateral triangles have all three sides equal.
  • Isosceles triangles have two equal sides.
  • Equilateral triangles are the most symmetric triangles.
3

3. Constructing Triangles When Sides Are Given

  • A triangle with three given sides can be constructed by drawing one side as the base first.
  • Arcs are then drawn from the two base vertices using the other two side lengths as radii.
  • The third vertex is the point where the arcs meet.
4

4. Two Sides and the Included Angle

  • A triangle can be constructed when two sides and the angle included between them are given.
  • Take one of the given sides as the base.
  • Draw the given included angle at one end of the base.

Key Concepts

Central concept: Triangles and their construction, classification, and angle properties

Basic parts of a triangleTriangle namingEquilateral triangleIsosceles triangleScalene triangleRight-angled triangleAcute-angled triangleObtuse-angled triangle

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Frequently Asked Questions

What are the important topics in A Tale of Three Intersecting Lines for CBSE Class 7 Mathematics?
Key topics in A Tale of Three Intersecting Lines include Basics of a Triangle, Equilateral and Isosceles Triangles, Constructing Triangles When Sides Are Given, Two Sides and the Included Angle. Study these first, then practise questions on each for Class 7 exams.
How should I revise A Tale of Three Intersecting Lines for Class 7 exams?
Learn the core ideas first, then work through the 42 practice questions on A Tale of Three Intersecting Lines. 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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All CBSE Class 7 Mathematics Syllabus

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