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# Why were pie charts used in 1801?

# 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…e and each slice to the chart is a certain percentage of the whole thing. The bigger the slice is the more percentage of the whole thing is made up of that part or slice. It can be used to show how much something is liked compared to other things, business sales by each business compared to a whole and sports stats also. Because the information can be easily read and therefore makes it easy to present and analyse data. Each section can be viewed easily with different sections and colours. 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 when representing how the measured statistic, or "piece," fits into the whole "pie" (100%). For example: In a family of 6, there is a father, mother, 3 brothers and 1 sister. A pie chart comparing males to females in this family would show a 72% male piece and a 38% female piece.

# 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…ch graphs are used according to WikiPedia

# 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…hen representing how the measured statistic, or "piece," fits into the whole "pie" (100%). For example: In a family of 6, there is a father, mother, 3 brothers and 1 sister. A pie chart comparing males to females in this family would show a 72% male piece and a 38% female piece.

# 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)

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# 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

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# Why are pie charts useful and important?

To show classes or groups of data in proportions.

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# When could you used a pie chart?

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

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# When is it good to use a pie chart?

When you want to compare proportions of a similar thing.

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# 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 …data is split up, like slices in a pie, and how much each element contributes to the whole lot. A company could have its total expenditure, and in slices show how much goes on different aspects of what they spend it on. Slices can be shown with values or with percentages. Surveys showing what percentage of people had particular opinions on an issue would be good for a pie chart.