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Revision Notes

Area of a Trapezium and a Polygon — Revision Notes

ICSE · Class 8 · Mathematics

Area of a Trapezium and a Polygon revision notes for ICSE Class 8 Mathematics: 4 topics in quick points. Part of the ICSE Class 8 Mathematics syllabus.

64 questions30 flashcards21 formulas & key relations5 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?
Key topics in Area of a Trapezium and a Polygon include Basics of Perimeter and Area, Triangle Formulas and Solved Patterns, Rectangle and Square, Trapezium and Parallelogram. Study these first, then practise questions on each for Class 8 exams.
How should I revise Area of a Trapezium and a Polygon for Class 8 exams?
Learn the core ideas first, then work through the 64 practice questions on Area of a Trapezium and a Polygon. 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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