Rd Sharma 2018 Solutions for Class 7 Math Chapter 1 Integers are provided here with simple step-by-step explanations. These solutions for Integers are extremely popular among Class 7 students for Math Integers Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Rd Sharma 2018 Book of Class 7 Math Chapter 1 are provided here for you for free. You will also love the ad-free experience on Meritnationâ€™s Rd Sharma 2018 Solutions. All Rd Sharma 2018 Solutions for class Class 7 Math are prepared by experts and are 100% accurate.

#### Page No 19.3:

#### Question 1:

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

Faces (F) | 6 | 4 | 9 | 7 |

Edges (E) | 12 | 6 | 16 | 15 |

Vertex (V) | 8 | 4 | 9 | 10 |

#### Answer:

I | II | III | IV | |

Faces (F) | 6 | 4 | 9 | 7 |

Edges (E) | 12 | 6 | 16 | 15 |

Vertices (V) | 8 | 4 | 9 | 10 |

Euler's formula (F − E + V) | 6 − 12 + 8 = 2 | 4 − 6 + 4 = 2 | 9 − 16 + 9 = 2 | 7 − 15 + 10 = 2 |

#### Page No 19.3:

#### Question 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.

#### Answer:

Examples of

(i) Cone: Ice-cream cone, clown cap, rocket

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

(iii) Cuboid: book, brick, duster

(iv) Cylinder: circular pipe, glass, circular pole

(v) Christmas decorations, cheese and patio umbrellas.

#### Page No 19.5:

#### Question 1:

Match the following nets with appropriate solids:

#### Answer:

Here

(a) → (ii)

(b) → (iii)

(c) → (iv)

(d) → (i)

#### Page No 19.6:

#### Question 2:

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

#### Answer:

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

#### Page No 19.6:

#### Question 3:

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

#### Answer:

Since, 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.

#### Page No 19.6:

#### Question 4:

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

#### Answer:

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

#### Page No 19.6:

#### Question 5:

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

#### Answer:

The complete nets for making a cube are

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