Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids

Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids

Selina Publishers Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids

Recognition of Solids Exercise 31 – Selina Concise Mathematics Class 6 ICSE Solutions

Question 1.
Identify the nets which can be used to form cubes :
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids Q1
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids 1

Question 2.
Draw at least three different nets for making cube.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids 2

Question 3.
The dimensions of a cuboid are 6 cm, 4 cm and 3 cm. Draw two different types of oblique sketches for this cuboid.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids 3

Question 4.
Two cubes, each with 3 cm edge, are placed side by side to form a cuboid. For this cuboid, draw :
(i) an oblique sketch
(ii) an isometric sketch.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids 4

Question 5.
The figure, given below, shows shadows of some 3D objects, when seen under the lamp of an overhead projector :
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids Q5
In each case, name the object.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids 5

Question 6.
Look at the solids, drawn below, and fill the given chart.
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids Q6
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids Q6.1
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids 6

P. Q. Using Euler’s formula, find the values of a, b, c and d.
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids Q6.2
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids 7

P.Q. Using an isometric dot paper, draw :
(i) a cube with each edge 3 cm.
(ii) a cuboid measuring 5 cm x 4 cm x 3 cm.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids 8

Question 7.
Dice are cubes with dot or dots on each face. Opposite faces of a die always have a total of seven on them.
Below are given two nets to make dice (cube), the numbers inserted in each square indicate the number of dots in it.
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids Q7
Insert suitable numbers in each blank so that numbers in opposite faces of the die have a total of seven dots.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids 9

Question 8.
The following figure represents mets of some solids. Name the solids.
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids Q8
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 31 Recognition of Solids 10

Selina Concise Mathematics Class 6 ICSE Solutions