Interpreting Pie Charts

​Pie Charts

By Allan Dickson

Open Ended

What do you remember about Tuesday's lesson on interpreting pie charts?

Pie Charts

We use a pie chart to show how popular a category was in a survey based on how big its slice is.

The bigger a categories slice, the bigger angle it has.

And we can use the formula to see how many people voted for that category.

Interpreting Pie Charts

The Formula

Multiple Choice

32 cooks were asked what their favourite pie was.

How many cooks chose rhubarb pie?

• 0.125

• 4

• 8

• 12

Draw

Write down what working you done

Multiple Choice

Out of the 32 cooks, how many chose Apple pie?

• 8

• 16

• 0.375

• 12

Fractions and Pie Charts

​What to do

When were asked what fraction of people chose a certain category we have to give our answer as a fraction.

We can either use the angles or the totals, it depends what we are given.

Fractions and Pie Charts

Using angles - we take the angle the category has and divide it by 360.

Using totals - we take the category total and divide it by the total

Multiple Choice

We know that 12 cooks choose apple pie as their favourite.

What fraction of the 32 cooks is this?

• 12/32

• 12/135

• 12/360

• 3/8

Multiple Choice

If 8 cooks chose mince, how many cooks chose either cherry or steak?

• Unsure, not enough info given

• 16

• 8

• 4

Open Ended

What was your reasoning?

Draw

Fill in the missing angle for blue.

Poll

Would you be interested in having more lessons like this?

• Yes, I enjoyed this

• Not bothered, I have no opinion

• No, this was not it