Suppose we are given data like
Company |
Percentage of people |
Samsung |
40% |
Apple |
25% |
Vivo |
20% |
Mi |
15% |
We convert
Percentage → Angles
We know that
Angle at center = 360°
So, we convert
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 |
1/4 × 360 = 90° |
Vivo |
20% |
20/100 = 2/10 |
2/10 × 360 = 2 × 36 = 72° |
Mi |
15% |
15/100 = 3/20 |
3/20 × 360 = 3 × 18 = 54° |
We follow the steps
- Draw a circle of any radius.
Mark Radius as OA.
- Put protractor on AO and
Draw largest angle 144°
- Now, put protractor on AO
and
Mark next largest angle 90°
- Now, put protractor on OC and
Mark next largest angle 72°
- The remaining portion is 54°
- Now, label the pie chart
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
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 = 1/5 |
1/5 × 360 = 72° |
Romance |
5% |
5/100 = 1/20 |
1/20 × 360 = 18° |
We follow these steps
- Draw a circle of any radius.
Mark Radius as OA.
- Put protractor on OA and
Draw largest angle i.e 180°
- Now, put protector on OB, and draw the next largest angle i.e 90°
- Put protractor on OC and mark next largest angle i.e 72°
- The remaining portion is 18°
- Now, Label the pie chart
Company |
Percentage of people |
Angle |
Super hero |
50% |
180° |
Animated |
25% |
90° |
Comedy |
20% |
72° |
Romance |
5% |
18° |