Suppose we are given data like

Company

Percentage of people

Samsung

40%

Vivo

20%

Mi

15%

 

We convert

  Percentage → Angles

 

We know that

  Angle at center = 360°

 

So, we convert

3.jpg

So, our table becomes.

Company

Percentage of people

Fraction

Angle = Fraction × 360 °

Samsung

40%

40/100 = 4/10

4/10 × 360 = 4 × 36 = 144

Apple

25%

25/100 = 1/4

25/100 = 1/4  = 90° 

Vivo

20%

20/100 = 2/10

 

2/10 × 360 = 2 × 36 = 72° 

Mi

15%

15/100 = 3/20

3/20 × 360 = 3 × 18

 

We follow the steps

  1. Draw a circle of any radius.

     Mark Radius as OA.

4.jpg

  1. Put protractor on AO and

   Draw largest angle 144°

5.jpg

 

  1. Now, put protractor on AO

         and

    Mark next largest angle 90°

6.jpg

  1. Now, put protractor on OC and

     Mark next largest angle 72°

7.jpg

 

  1. The remaining portion is 54°

8.jpg

  1. Now, label the pie chart

9.jpg

Company

Percentage of people

Angle

Samsung

40%

144°

Apple

25%

90°

Vivo

20%

72°

Mi

15%

54°

Let’s take another example

 

We are given the type of movie that students of class VIII like are

Company

Percentage of people
Super hero

50%

Animated

25%

Comedy

20%

Romance

5%

Draw a pie chart of the same

 

Suppose we are given data in following from

 

Now to make pie chart we have find angles

Company

Percentage of people

Fraction

Angle = Fraction × 360 °

Super hero

50%

50/100 = 1/2

1/2 × 360 = 180°

Animated

25%

25/100 = 1/4

1/4 = 360 = 90° 

Comedy

20%

20/100 = 2/10

 

1/5 × 360 = 72° 

Romance

5%

5/100 = 1/20

1/20 × 360 = 18°

 

We follow these steps

  1. Draw a circle of any radius.

     Mark Radius as OA.

10.jpg

  1. Put protractor on OA and

   Draw largest angle i.e 180°

11.jpg

  1. Now, put protector on OB, and draw the next largest angle i.e 90°

12.jpg

  1. Put protractor on OC and mark next largest angle i.e 72°

 

  1. Chapter 5 Class 8 Data Handling
  2. Concept wise
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Transcript

Drawing a pie chartSuppose we are given data like We convert Percentage → Angles We know that Angle at center = 360° So, we convert So, our table becomes. We follow the steps 1. Draw a circle of any radius. Mark Radius as OA. 2. Put protractor on AO and Draw largest angle 144° 3. Now, put protractor on AO and Mark next largest angle 90° 4. Now, put protractor on OC and Mark next largest angle 72° 5. The remaining portion is 54° 6. Now, label the pie chart Let’s take another example We are given the type of movie that students of class VIII like are Draw a pie chart of the same Suppose we are given data in following from Now to make pie chart we have find angles We follow these steps 1. Draw a circle of any radius. Mark Radius as OA. 2. Put protractor on OA and Draw largest angle i.e 180° 3. Now, put protector on OB, and draw the next largest angle i.e 90° 4. Put protractor on OC and mark next largest angle i.e 72° 5. The remaining portion is 18° 6. Now, Label the pie chart

About the Author

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.