A pie chart is a circular graph where sectors represent different groups in proportion to each other.

A sector is a part, or ‘pie-slice’ part, of a pie chart.

Use understanding of angles, fractions and percentages to construct pie charts

Maths

In this unit pupils will interpret and construct pie charts and line graphs and use these to solve problems. They will read scales in graphing and measures contexts linking to fractions, angles, percentages and understanding proportional relationships In the future unit pupils will learn how to calculate the mean of a set of data and use the mean to make comparisons between two sets of information

In the prior unit pupils explained what percent meant and how to represent a percentage in different ways. They learned how to convert percentages to decimals and fractions and solved conversion problems. In this unit pupils will interpret and construct pie charts and line graphs. They will read scales  linked to fractions angles percentages and understanding proportional relationships.

Statistics

Izzy goes pond dipping and collects 36 creatures. She draws a pie chart to show her data. How many degrees will the sector to show the tadpoles be? {{ }}°

Jun draws a pie chart to represent the 18 creatures he found while pond-dipping. The sector to represent the water boatmen measures 40°. How many did he find?

Jacob goes pond dipping and only finds 9 creatures. He draws a pie chart. How many degrees are needed for a sector to show 5 creatures? {{ }}° 

Over a week of birdwatching, Jacob spots 18 birds and represents the data as a pie chart. He sees 6 sparrows. How many degrees will the sector for this be? {{ }}°

Jun notices that $${1} \over {5}$$ of the whole amount of creatures he collected in a pond dip are water snails. How many degrees would be needed to represent this on his pie chart? {{ }}°

 Izzy counts 50 different minibeasts at the park. 5 of them were woodlice. How many degrees would she need to represent this on a pie chart? {{ }}°

12 children chose dogs as their favourite pets.

3 children chose rabbits as their favourite pet.

6 children chose cats as their favourite pet.

The pie chart shows the favourite pets of 24 Year 6 children. Which of the following is true?

This pie chart shows the lunch choices made by the Year 6 children last week. An equal number of children chose pizza, pasta and fish. How many degrees is the sector for pizza?

The pie chart represents the number of children from different year groups in Art class. What percentage of children were from Year 5? {{ }}%

The pie chart shows the hobbies of 48 children. An equal number chose jogging, cinema and art. 2 more children preferred reading to cycling. Match the activity to the correct number of children.

The pie chart represents the travel of 60 Year 5 children last week. How many children walked to school?

The pie chart represents the favourite fruit of the 120 children in Key Stage 1 at Oak Academy. 10% more children chose cherries than chose pears. What percentage of children chose cherries? {{ }}%

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