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Chapter Summary

Quadrilaterals — Chapter Summary

CBSE · Class 8 · Mathematics

Summary of Quadrilaterals for CBSE Class 8 Mathematics. Part of the CBSE Class 8 Mathematics syllabus. Quadrilaterals are four-sided figures. The word.

84 questions60 flashcards9 formulas & key relations5 concepts

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Overview

Quadrilaterals are four-sided figures. The word comes from Latin: quadri means four and latus means sides. A quadrilateral has four sides and four angles. Many important shapes in geometry are special types of quadrilaterals, such as rectangles, squares, rhombuses, kites, trapeziums, and parallelogr

Key Concepts

A quadrilateral is a four

A quadrilateral is a four-sided figure with four angles. The angles are the angles between its sides.

A rectangle is a quadrilateral

A rectangle is a quadrilateral in which the angles are all 90°; earlier it is also defined as a quadrilateral with all right angles and opposite sides

A square is a quadrilateral

A square is a quadrilateral in which all angles are 90° and all sides are equal. Every square is a rectangle, but every rectangle is not a square. The

A quadrilateral can be split into

A quadrilateral can be split into two triangles by a diagonal. Since each triangle has angle sum 180°, the sum of all angles in any quadrilateral is 3

A parallelogram is a quadrilateral

A parallelogram is a quadrilateral with two pairs of parallel opposite sides. Its diagonals bisect each other.

Learning Objectives

  • Identify a quadrilateral and distinguish it from non-quadrilateral figures
  • Understand the definitions of rectangle, square, rhombus, kite, trapezium, isosceles trapezium, and parallelogram
  • Use diagonals and triangle congruence to prove properties of quadrilaterals
  • Find the sum of angles in any quadrilateral
  • Recognise how special quadrilaterals are related to one another

Frequently Asked Questions

What are the important topics in Quadrilaterals for CBSE Class 8 Mathematics?
Key topics in Quadrilaterals include Basic idea of a quadrilateral, Rectangle and square, Angle sum of a quadrilateral, Parallelogram. Study these first, then practise questions on each for Class 8 exams.
How should I revise Quadrilaterals for Class 8 exams?
Learn the core ideas first, then work through the 84 practice questions on Quadrilaterals. 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.

More resources for Quadrilaterals

All CBSE Class 8 Mathematics Chapter Summary

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