## Selina Concise Mathematics Class 7 ICSE Solutions Chapter 18 Recognition of Solids (Representing 3-D in 2-D)

**Selina Publishers Concise Mathematics Class 7 ICSE Solutions Chapter 18 Recognition of Solids (Representing 3-D in 2-D)**

### Recognition of solids Exercise 18 – Selina Concise Mathematics Class 7 ICSE Solutions

**Question 1.****Identify the nets which can be used to form cubes****Solution:**

**Question 2.****Draw at least three different nets for making cube.****Solution:**

**Question 3.****The figure, given below, shows shadows of some 3D objects, when seen under the lamp of an overhead projector :****In each case, name the object.****Solution:**

**Question 4.****Using Euler’s formula, find the values of a, b, c and d.**

**Solution:**

**Question 5.****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.**

Insert suitable numbers in each blank so that numbers in opposite faces of the die have a total of seven dots.**Solution:**

**Question 6.****The following figures represent nets of some solids. Name the solids****Solution:**

**Question 7.****Draw a map of your class room using proper scale and symbols for different objects.****Solution:**

**Question 8.****Draw a map of your school compound using proper scale and symbols for various features like play ground, main building, garden, etc.****Solution:**

**Question 9.****In the map of India, the distance between two cities is 13.8 cm.**** Taking scale : 1 cm = 12 km, find the actual distance between these two cities.****Solution:**