Question

In a school, there are 100 students in class VII and every student is a member of any one of the club. The following table shows the number of students in various clubs, then Construct the pie chart to following data:

Club	Number of members
Mathematics	50
Science	30
Social Studies	40
English	40
Arts	20

Answer 1

The angle of each sector will depend on the ratio between the number of students in club and total number of students.

Angle of sector = \(\frac {Value\,of\,the\,items}{Sum\,of\,the\,values\,of\,all\,items}\) x × 360°

Steps of construction:

1. Draw a circle with any convenient radius and mark it’s centre as ‘O’. 

2. Mark a point A, somewhere on the circumference and join OA. 

3. Construct ∠AOB = 100° to represent angle of the sector for Maths club. 

4. Construct ∠BOC = 60° to represent angle of the sector for Science club.

5. Construct ∠COD = 80° to represent angle of the sector for Social Studies club. 

6. Construct ∠DOE = 80° to represent angle of the sector for English club. 

7. Now ∠EOA = 40° to represent angle of the sector for Arts club.