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NCERT Book for Class 7 Mathematics Chapter 15 Visualising Solid Shapes
Class 7 Mathematics students should refer to the following NCERT Book Chapter 15 Visualising Solid Shapes in Class 7. This NCERT Book for Class 7 Mathematics will be very useful for exams and help you to score good marks
Chapter 15 Visualising Solid Shapes NCERT Book Class 7
Visualising Solid Shapes
15.1 INTRODUCTION: PLANE FIGURES AND SOLID SHAPES
In this chapter, you will classify figures you have seen in terms of what is known as dimension. In our day to day life, we see several objects like books, balls, ice-cream cones etc., around us which have different shapes. One thing common about most of these objects is that they all have some length, breadth and height or depth. That is, they all occupy space and have three dimensions. Hence, they are called three dimensional shapes. Do you remember some of the three dimensional shapes (i.e., solid shapes) we have seen in earlier classes?
Try to identify some objects shaped like each of these. By a similar argument, we can say figures drawn on paper which have only length and breadth are called two dimensional (i.e., plane) figures. We have also seen some two dimensional figures in the earlier classes.
15.2 FACES, EDGES AND VERTICES
Do you remember the Faces, Vertices and Edges of solid shapes, which you studied earlier? Here you see them for a cube: Fig 15.3 The 8 corners of the cube are its vertices. The 12 line segments that form the skeleton of the cube are its edges. The 6 flat square surfaces that are the skin of the cube are its faces.
Can you see that, the two dimensional figures can be identified as the faces of the three dimensional shapes? For example a cylinder has two faces which are circles, and a pyramid, shaped like this has triangles as its faces. We will now try to see how some of these 3-D shapes can be visualised on a 2-D surface, that is, on paper. In order to do this, we would like to get familiar with three dimensional objects closely. Let us try forming these objects by making what are called nets.
15.3 NETS FOR BUILDING 3-D SHAPES
Take a cardboard box. Cut the edges to lay the box flat. You have now a net for that box. A net is a sort of skeleton-outline in 2-D [Fig154 (i)], which, when folded [Fig154 (ii)], results in a 3-D shape [Fig154 (iii)]. Here you got a net by suitably separating the edges. Is the reverse process possible?
Here is a net pattern for a box (Fig 15.5). Copy an enlarged version of the net and try to make the box by suitably folding and gluing together. (You may use suitable units). The box is a solid. It is a 3-D object with the shape of a cuboid. Similarly, you can get a net for a cone by cutting a slit along its slant surface (Fig 15.6).
You have different nets for different shapes. Copy enlarged versions of the nets given (Fig 15.7) and try to make the 3-D shapes indicated. (You may also like to prepare skeleton models using strips of cardboard fastened with paper clips). Fig 15.7 We could also try to make a net for making a pyramid like the Great Pyramid in Giza (Egypt) (Fig 15.8). That pyramid has a square base and triangles on the four sides
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Please refer to attached file for NCERT Class 7 Maths Visualising Solid Shapes
| NCERT Class 7 Maths Integers |
| NCERT Class 7 Maths Fractions and Decimals |
| NCERT Class 7 Maths Data Handling |
| NCERT Class 7 Maths Simple Equations |
| NCERT Class 7 Maths Lines and Angles |
| NCERT Class 7 Maths The Triangle and Its Properties |
| NCERT Class 7 Maths Congruence of Triangles |
| NCERT Class 7 Maths Comparing Quantities |
| NCERT Class 7 Maths Rational Numbers |
| NCERT Class 7 Maths Practical Geometry |
| NCERT Class 7 Maths Perimeter and Area |
| NCERT Class 7 Maths Algebraic Expressions |
| NCERT Class 7 Maths Exponents and Powers |
| NCERT Class 7 Maths Symmetry |
| NCERT Class 7 Maths Visualising Solid Shapes |
| NCERT Class 7 Maths Solutions Answers |
Mathematics NCERT Book Class 7 Chapter 15 Visualising Solid Shapes
The above NCERT Books for Class 7 Mathematics Chapter 15 Visualising Solid Shapes have been published by NCERT for latest academic session. The textbook by NCERT for Chapter 15 Visualising Solid Shapes Mathematics Class 7 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Chapter 15 Visualising Solid Shapes NCERT etextbooks as the exams for Class 7 Mathematics are always asked as per the syllabus defined in these ebooks. These Class 7 Chapter 15 Visualising Solid Shapes book for Mathematics also includes collection of question. We have also provided NCERT solutions for Class 7 Mathematics which have been developed by teachers of StudiesToday.com after thorough review of the latest book and based on pattern of questions in upcoming exams for Class 7 students.
NCERT Book Class 7 Mathematics Chapter 15 Visualising Solid Shapes
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Chapter 15 Visualising Solid Shapes NCERT Book Class 7 Mathematics
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Class 7 Mathematics Chapter 15 Visualising Solid Shapes NCERT Book
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Class 7 Chapter 15 Visualising Solid Shapes NCERT Book Mathematics
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