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Revision Notes

Recognition of Solids

ICSE · Class 7 · Mathematics

Quick revision notes for Recognition of Solids — ICSE Class 7 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

54 questions26 flashcards5 concepts

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Key Topics to Revise

1

1. Identifying 2D and 3D Figures

  • A straight line has only one dimension: length.
  • A rectangle has two dimensions: length and breadth.
  • All rectilinear figures such as square, parallelogram, and trapezium are two-dimensional figures.
2

2. Cube, Cuboid, Cylinder, and Cone

  • A cube is a symmetrical three-dimensional shape, solid or hollow, contained by six equal squares.
  • A cube is a cuboid with all sides equal, i.e. length = breadth = height.
  • Each face of a cube is a square and all six faces are congruent.
3

3. Faces, Edges, and Vertices

  • A cuboid has six rectangular faces, twelve edges, and eight vertices.
  • A cube has six faces, twelve edges, and eight corners, same as a cuboid.
  • Cube has V=8, E=12, F=6.
4

4. Euler's Formula

  • Euler's formula is V + F - E = 2 for a polyhedron.
  • V means number of vertices.
  • E means number of edges.

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Full Notes

Key Concepts

A solid is an objectA straight line has only lengthA cube is a symmetrical threeA cuboid is a solidA cylinder is a non

Frequently Asked Questions

What are the important topics in Recognition of Solids for ICSE Class 7 Mathematics?
Recognition of Solids covers several key topics that are frequently asked in ICSE Class 7 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Recognition of Solids — ICSE Class 7 Mathematics?
Understand the core concepts first, then work through the 54 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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