NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.1

These NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.1 Questions and Answers are prepared by our highly skilled subject experts.

NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Exercise 15.1

Question 1.
Identify the nets which can be used to make cubes (cut out copies of the nets and try it):
NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.1 1
NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.1 2
Answer:
(ii), (iii), (iv) and (vi) can be used to make cubes.

NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.1

Question 2:
Dice are cubes with dots on each face. Opposite faces of a die always have a total of seven dots on them.
Here are two nets to make dice (cubes); the numbers inserted in each square indicate the number of dots in that box.
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Insert suitable numbers in the blanks, remembering that the number on the opposite faces should total to 7.
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Answer:
NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.1 5

Question 3.
Can this be a net for a die? Explain your answer.
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Answer:
No, because one pair of opposite faces will have 1 and 4 on them whose total is not equal to 7. Another faces are having 3 and 6 on them whose total is also equal to 7.

NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.1

Question 4.
Here is an incomplete net for making a cube. Complete it in at least two different ways. Remember that a cube has six faces. How many are there in the net here? (Give two separate diagrams. If you like, you may use a squared sheet for easy manipulation.)
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Answer:
NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.1 8

Question 5.
Match the nets with appropriate solids:
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NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.1 10
Answer:
(a) → (ii): because, the net (ii) can be folded as square.
(b) → (iii): because, the net (iii) can be folded as cylinder.
(c) → (iv): because, the net (iv) can be folded as cone.
(d) → (i): because, the net (i) can be folded as pyramid.

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