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Recognition of Solids — Chapter Summary

ICSE · Class 7 · Mathematics

Summary of Recognition of Solids for ICSE Class 7 Mathematics. Part of the ICSE Class 7 Mathematics syllabus. A solid is an object of fixed shape that.

54 questions26 flashcards8 formulas & key relations5 concepts

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Overview

A solid is an object of fixed shape that occupies space. Solids have length, breadth, and height, so they are three-dimensional figures. Shapes such as a cube, cuboid, cylinder, and cone help in understanding how 3D objects are identified, counted, and represented on paper through nets and maps.

Key Concepts

A solid is an object

A solid is an object of fixed shape that occupies space. It has length, breadth, and height, so it is a three-dimensional figure.

A straight line has only length

A straight line has only length, so it is one-dimensional. A rectangle has length and breadth, so it is two-dimensional.

A cube is a symmetrical three

A cube is a symmetrical three-dimensional shape with six equal square faces. It is a cuboid with all sides equal, so length = breadth = height. A cube

A cuboid is a solid

A cuboid is a solid or hollow rectangular body with six rectangular faces at right angles to each other. It has 8 vertices, 12 edges, and 6 faces.

A cylinder is a non

A cylinder is a non-polyhedron with a curved side and two identical circular flat ends. It has 0 vertices, 2 edges, and 3 faces.

Learning Objectives

  • Recognize solids and distinguish them from one-dimensional and two-dimensional figures
  • Identify cube, cuboid, cylinder, and cone using their faces, edges, and vertices
  • Understand the difference between polyhedra and non-polyhedra
  • Use Euler's formula for a polyhedron
  • Recognize nets of solid shapes

Frequently Asked Questions

What are the important topics in Recognition of Solids for ICSE Class 7 Mathematics?
Key topics in Recognition of Solids include Identifying 2D and 3D Figures, Cube, Cuboid, Cylinder, and Cone, Faces, Edges, and Vertices, Euler's Formula. Study these first, then practise questions on each for Class 7 exams.
How should I revise Recognition of Solids for Class 7 exams?
Learn the core ideas first, then work through the 54 practice questions on Recognition of Solids. 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 Recognition of Solids

All ICSE Class 7 Mathematics Chapter Summary

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