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Formula Sheet

Understanding shape — Formula Sheet

ICSE · Class 8 · Mathematics

7 formulas from Understanding shape (ICSE Class 8 Mathematics) on one page, grouped by topic. Part of the ICSE Class 8 Mathematics syllabus.

63 questions28 flashcards7 formulas & key relations5 concepts

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7 Entries · 3 Sections

Formulas and Key Relations

Angles of a Polygon

Sum of interior angles of a polygon = (n - 2) × 180°

Sum of interior angles in right angles = (2n - 4) × 90° = (2n - 4) right angles

Sum of exterior angles of a polygon = 360°

Exterior angle + interior angle = 180°

Regular Polygon

Each interior angle of a regular polygon = (2n - 4) × 90° / n

Number of sides of a regular polygon from exterior angle: n = 360° / Exterior angle

Sum of Interior Angles of a Polygon

Sum of interior angles of a polygon with n sides = (n - 2) × 180°.

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Frequently Asked Questions

What are the important topics in Understanding shape for ICSE Class 8 Mathematics?
Key topics in Understanding shape include Curves, Open Curves, and Closed Curves, Polygons and Their Parts, Types of Polygons, Sum of Interior Angles of a Polygon. Study these first, then practise questions on each for Class 8 exams.
How many formulas are in Understanding shape?
This sheet lists 7 formulas from Understanding shape, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Understanding shape for Class 8 exams?
Learn the core ideas first, then work through the 63 practice questions on Understanding shape. 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 Understanding shape

All ICSE Class 8 Mathematics Formula Sheet

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