RD Sharma Solutions for Class 7 Maths Chapter 19 Visualising Solid Shapes

The PDF of RD Sharma Solutions for Class 7 Maths Chapter 19 Visualising Solid Shapes are downloaded from the given links. Class 7 is a stage where several new topics are introduced. Our experts formulate RD Sharma Solutions to help students in their exam preparation to achieve excellent marks in Maths.  Let us have a look at some important topics being discussed in this chapter.

  • One-dimensional figures
  • Two-dimensional figures
  • Three-dimensional figure
  • Faces, Edges and vertices of
    • Cube
    • Cuboid
    • Pyramid
    • Cylinder
    • Cone
    • sphere
  • Nets for building 3D – Shapes
  • Euler’s formula

RD Sharma Solutions for Class 7 help students to get a good score in the examinations. It also provides extensive knowledge about the subject, as Class 7 builds a foundation in their academic career. The solutions are stepwise and detailed to make learning easy for students.

Download the PDF of RD Sharma Solutions For Class 7 Maths Chapter 19 Visualising Solid Shapes

 

rd sharma class 7 maths solution ch 19 ex 1
rd sharma class 7 maths solution ch 19 ex 1
rd sharma class 7 maths solution ch 19 ex 2
rd sharma class 7 maths solution ch 19 ex 2
rd sharma class 7 maths solution ch 19 ex 2

 

Access answers to Maths RD Sharma Solutions For Class 7 Chapter 19 – Visualising Solid Shapes

Exercise 19.1 Page No: 19.3

1. Complete the following table and verify Euler’s formula in each case.

RD Sharma Solutions for Class 7 Maths Chapter 19 Visualising Solid Shapes Image 1

Solution:

RD Sharma Solutions for Class 7 Maths Chapter 19 Visualising Solid Shapes Image 2

(i) We know that Euler’s formula is (F – E + V)

(F – E + V) = (6 – 12 + 8) = 2

Hence Euler’s formula verified

(ii) We know that Euler’s formula is (F – E + V)

(F – E + V) = (4 – E + 4) = 2.

E = 6

Hence Euler’s formula verified

(iii) We know that Euler’s formula is (F – E + V)

From the figure,

(F – E + V) = (9 – 16 + 9) = 2.

Hence Euler’s formula verified

(iv) We know that Euler’s formula is (F – E + V)

From the figure,

(F – E + V) = (7 – 15 + 10) = 2.

Hence Euler’s formula verified

2. Give three examples from our daily life which are in the form of

(i) A cone

(ii) A sphere

(iii) A cuboid

(iv) A cylinder

(v) A pyramid.

Solution:

(i) Examples for Cone: Ice-cream cone, birthday cap

(ii) Examples of Sphere: Football, a round apple, an orange

(iii) Examples of Cuboid: dice, duster, book, rectangular box

(iv) Examples of Cylinder: circular pipe, glass, circular pole, gas cylinder

(v) Examples for Pyramid: Christmas tree, prism


Exercise 19.2 Page No: 19.5

1. Match the following nets with appropriate solids:

RD Sharma Solutions for Class 7 Maths Chapter 19 Visualising Solid Shapes Image 3

Solution:

(a) → (ii)

(b) → (iii)

(c) → (iv)

(d) → (i)

2. Identify the nets which can be used to make cubes (cut-out the nets and try it):

RD Sharma Solutions for Class 7 Maths Chapter 19 Visualising Solid Shapes Image 4

Solution:

Only (ii), (iv) and (vi) form a cube.

3. Can the following be a net for a die? Explain your answer.

RD Sharma Solutions for Class 7 Maths Chapter 19 Visualising Solid Shapes Image 5

Solution:

We know that in a die, the sum of the number of opposite faces of a die is 7. In the given figure, it is not possible to get the sum as 7. Hence the given net is not suitable for a die.

4. Out of the following four nets there are two correct nets to make a tetrahedron. Identify them.

RD Sharma Solutions for Class 7 Maths Chapter 19 Visualising Solid Shapes Image 6

Solution:

For making a tetrahedron, only (i) and (iii) are suitable nets.

5. Here is an incomplete net for making a cube. Complete it in at least two different ways.

RD Sharma Solutions for Class 7 Maths Chapter 19 Visualising Solid Shapes Image 7

Solution:

RD Sharma Solutions for Class 7 Maths Chapter 19 Visualising Solid Shapes Image 8


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