The document NCERT Solutions(Part - 1) - Visualising Solid Shapes Class 7 Notes | EduRev is a part of the Class 7 Course Mathematics (Maths) Class 7.

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**Exercise 15.1 **

**Question 1: **

**Identify the nets which can be used to make cubes (cut out copies of the nets and try it): **

**Answer 1: **

Cubeâ€™s nets are (ii), (iii), (iv) and (vi).

**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. **

** **

**Insert suitable numbers in the blanks, remembering that the number on the opposite faces should total to 7. **

**Answer 2: **

**Question 3: **

**Can this be a net for a die? Explain your answer. **

**Answer 3: **

No, this cannot be a net for a die.

Because one pair of opposite faces will have 1 and 4 on them and another pair of opposite faces will have 3 and 6 on them whose total is not equal to 7.

**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 faces are there in the net here? (Give two separate diagrams. If you like, you may use a squared sheet for easy manipulation.) **

**Answer 4: **

There three faces are given:

**Question 5: **

**Match the nets with appropriate solids:**

**Answer 5:**

**Exercise 15.2 **

**Question 1: Use isometric dot paper and make an isometric sketch for each one of the given shapes: **

**Answer 1: **

**Question 2: **

**The dimensions of a cuboid are 5 cm, 3 cm and 2 cm. Draw three different isometric sketches of this cuboid. **

**Answer 2: **

The dimensions of given cuboid are 5 cm, 3 cm and 2 cm:

Three different isometric sketches are:

**Question 3: **

**Three cubes each with 2 cm edge are placed side by side to form a cuboid. Sketch an oblique or isometric sketch of this cuboid. **

**Answer 3: **

**Oblique sketch:**

**Isometric sketch **

**Question 4: **

**Make an oblique sketch for each one of the given isometric shapes: **

**Answer 4: **

Oblique sketches:

**Question 5:**

**Give **

**(i) an oblique sketch and (ii) an isometric sketch for each of the following: **

**(a) A cuboid of dimensions 5 cm, 3 cm and 2 cm. (Is your sketch unique?) **

**(b) A cube with an edge 4 cm long. **

**Answer 5: **

**(a) **A cuboid of dimensions 5 cm, 3 cm and 2 cm.

**(i) **Oblique sketch

**(ii) **Isometric sketch

**(b)** A cube with an edge 4 cm long.

**(i)** Oblique sketch

**(ii)** Isometric sketch

**Question 6: **

**An isometric sheet is attached at the end of the book. You could try to make on it some cubes or cuboids of dimensions specified by your friend. **

**Answer 6: **

Cubes and cuboids shapes on isometric sheet given below:

You can also draw more shapes of cubes and cuboids.

211 videos|109 docs|45 tests

### NCERT Solutions(Part - 2) - Visualising Solid Shapes

- Doc | 1 pages
### Test: Visualising Solid Shapes - 2

- Test | 10 ques | 10 min
### Drawing the Nets of Various Shapes

- Video | 04:12 min
### NCERT Textbook - Visualising Solid Shapes

- Doc | 16 pages
### Chapter Notes - Visualizing Solid Shapes

- Doc | 3 pages
### Slicing 3D Shapes

- Video | 01:30 min

- Test: Visualising Solid Shapes - 1
- Test | 20 ques | 20 min
- Different Views of 3D Shapes
- Video | 04:44 min