## How to Make Pie graphs or Circle graph

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A pie chart is a **graphic** representation of info in the form of a **round chart** or pie where pie slices show the **size** of the data. A listing of mathematical variables along with categorical variables is needed in order to show data in a pie graph format. The **arc length** of each slice and so its area, along with the **central angle** it forms in the pie chart, is in proportion to the amount it represents.

### Pie Chart Formula

A pie chart’s **total** value is always **one hundred** percent. In addition, a circle subtends a \(360°\) angle. So, the total value of all the info equals \(360°\). Based on that, two primary formulas are used:

- To calculate the
**percentage**of the given info, use the following formula: \((Frequency \ \div \ Total Frequency) \ \times \ 100\) - To change the info to degrees use this formula: \((Provided \ data \ \div \ Total \ value \ of \ Information) \ \times \ 360°\)

It’s possible to figure out a specific pie chart’s percentage by using the steps here:

**Step 1: Classify**the given data and figure out the total**Step 2: Divide**up all the various categories**Step 3:**Change the data to**percentages****Step 4:**Calculate the**degrees**

### Ways to use Pie Charts

Whenever information has to get shown visually using a **fractional** part of a whole, we use pie charts. It is used to **compare** information and discover why one part is **smaller/bigger** than another. So, when you are given a **limited** amount of buckets along with **distinct** data sets, it’s a smarter idea to use pie charts. Here are a few uses for pie charts:

- In a
**business,**it is used to compare**growth**areas such as**profits**and**losses.** - In
**schools,**pie charts are used to show the**time**allocated to each**section,**thus showing pupils’**grades**as**percentages,**etc. - Pie charts are used to compare the
**relative quantity**of in regarding people having the same**vehicles,**similar**houses,**etc. - They are used to show
**marketing**and**sales**info to compare more than one brand.

### Making a Pie Chart

Here are the steps used to make a pie chart. Via using the **aforementioned formulas,** the information can be figured out.

**Step 1:**Place all the data in a**table,**after that,**add**it all of to discover the total.**Step 2:**To find the values in the form of a**percentage,**one has to divide each of them via the total, after that**multiply**it by one hundred.**Step 3:**To find the amount of**degrees**for each of the pie pieces you need, take a complete circle of \(360°\) and use the following formula: \(\frac{Frequency}{Total \ Frequency} \ \times \ 360°\)**Step 4:**Whenever all the degrees to make the pie chart are figured out,**draw**a**circle**(pie chart) using the**computed measurements**with the help of a protractor.

### Exercises for The Pie Graph or Circle Graph

**1) **Which color is the most?

**2) **Which color is the most?

**3) **What percentage of pie graph is black?

**4) **What percent of people voted for Sepehr?

**5) **What percentage of pie graph is red?

**6) **What percentage of pie graph is red?

**7) **Which color is the least?

**8) **Which color is the least?

**9) **What percent of people voted for Emma?

**10) **What percentage of pie graph is yellow?