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Revision Notes

Area of a Trapezium and a Polygon

ICSE · Class 8 · Mathematics

Quick revision notes for Area of a Trapezium and a Polygon — ICSE Class 8 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

64 questions30 flashcards5 concepts

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Key Topics to Revise

1

1. Basics of Perimeter and Area

  • Perimeter is the length of the boundary of a plane figure.
  • Area is the amount of surface enclosed by the sides of a plane figure.
  • Common units of perimeter are metre, centimetre, and decimetre.
2

2. Triangle Formulas and Solved Patterns

  • Perimeter of a triangle is the sum of its three sides.
  • Semi-perimeter is half the perimeter.
  • Heron's formula is used when all three sides are known.
3

3. Rectangle and Square

  • Perimeter of a rectangle is twice the sum of length and breadth.
  • Area of a rectangle is length times breadth.
  • Diagonal of a rectangle is found using Pythagoras theorem.
4

4. Trapezium and Parallelogram

  • A trapezium has a pair of parallel sides.
  • Height of a trapezium means the distance between its parallel sides.
  • Area of a trapezium is half the sum of the parallel sides times height.

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Full Notes

Key Concepts

The perimeter of a plane figureA triangle’s perimeter is the sumThe area of an equilateral trianglePerimeter of a rectangle is 2(l+b)Perimeter of a square is 4×side

Frequently Asked Questions

What are the important topics in Area of a Trapezium and a Polygon for ICSE Class 8 Mathematics?
Area of a Trapezium and a Polygon covers several key topics that are frequently asked in ICSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Area of a Trapezium and a Polygon — ICSE Class 8 Mathematics?
Understand the core concepts first, then work through the 64 practice questions available for this chapter. Revise formulas and 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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