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Formula Sheet

Quadrilaterals — Formula Sheet

CBSE · Class 8 · Mathematics

9 formulas from Quadrilaterals (CBSE Class 8 Mathematics) on one page, grouped by topic. Part of the CBSE Class 8 Mathematics syllabus.

84 questions60 flashcards9 formulas & key relations5 concepts

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9 Entries · 3 Sections

Formulas and Key Relations

Rectangle and Square Properties

AC = BD

OA = OC and OB = OD

All angles = 90°

Square diagonals are equal and bisect each other at 90°

In a square, ∠1 + ∠3 + 90 = 180, with ∠1 = ∠3 ⟹ ∠1 = ∠3 = 45°

Angles in a Quadrilateral

∠1 + ∠2 + ∠3 + ∠4 + ∠5 + ∠6 = 180° + 180° = 360°

The sum of all angles in any quadrilateral is 360°.

Parallelogram and Trapezium

Property 4: The diagonals of a parallelogram bisect each other.

∠S + ∠P = 180° and ∠R + ∠Q = 180°

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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 many formulas are in Quadrilaterals?
This sheet lists 9 formulas from Quadrilaterals, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
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 Formula Sheet

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