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# Why were pie charts used in 1801?

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For the same sorts of uses as they are today : to illustrate how a total value is divided into smaller groups.

A pie chart (a circle divided into slices of various angular widths) is used to show comparative percentages within a whole. The size of a slice is proportional to the share that is assigned to a given subgroup, role, or division. For example, a pie chart for business revenue can be divided into wedges showing the sources of that revenue (sales, stock dividends, franchising), and the sales wedge could be 2/3 or 3/4 of the pie, with other earnings areas having smaller slices.
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# What is a pie chart used for?

A pie chart which is the most used chart in the business world is used to show how much something is worth compared to the whole thing. A chart is usually based on a 100% scal

# Use of pie chart?

  To show fractions or parts of a whole.

# When should a pie chart be used?

  when you need to know how many things u need

# How do you use a pie chart?

You use the percentages and record them.

# Who first used the Pie Chart?

The inventor of the Pie Chart was not Florence Nightingale. The earliest known pie chart is generally credited to William Playfair's Statistical Breviary of 1801, where two su

# Why do people use pie charts?

Because its a circle

# Are angles used in Pie Charts?

Yes. Angles are used to draw pie charts so that each portion has an equal amount of the circle by the total.

# Pie charts are useful for representing what?

how much the different parts of something contribute to the whole.

# What are pie charts used for?

   they are used for percentages of a whole.   

# When is a pie chart used?

A pie chart is not used for sophisticated mathematical analysis. It is used to show how a given quantity is divided up, in a way can be easily seen. A pie chart is best used w

# When should pie charts be used?

When you need to put information together.

# What can be used in a pie chart?

the percentage of a certain subject (easy visual)
In Science

# Why do people use a pie chart?

To show statistics, it was first used by Florence Nightingale to show the British government the statistics of the amount of hospital patients dying unnecessarily
In Science

# Why are pie charts useful and important?

To show classes or groups of data in proportions.
In Science

# When could you used a pie chart?

When analysing a report of diffrent location like traffic jam,health and safety etc.
In Science

# When is it good to use a pie chart?

When you want to compare proportions of a similar thing.

# Why use a pie chart over any other chart?

It would depend on your data. Different types of data are suited to different types of charts. A pie chart can only have one series. So you are usually showing how a block of