Circle graph: cats 12, dogs 18, fish 6, birds 4

Step by step

The question

Question: make a circle graph of cats 12, dogs 18, fish 6, birds 4.

A circle graph shows the parts of a whole as slices.

The whole circle is 360 degrees.

1 Find the total

First the whole: 12 plus 18 plus 6 plus 4 is 40.

2 Each part of 360°

Cats: 12 out of 40, that is 3/10.

Of 360 degrees: 108°.

Dogs: 18 out of 40, of 360, is 162°.

Fish: 6 out of 40, of 360, is 54°.

Birds: 4 out of 40, of 360, is 36°.

Careful!

The parts are counts, not percents.

Each one is out of the total, 40.

3 Draw the circle graph

We draw a circle and start at the top.

Cats: a slice of 108°, going round like a clock.

Then dogs, 162°, and so on.

So the slices are cats 108°, dogs 162°, fish 54° and birds 36°.

4 Check

Let's check: the slices fill the circle: 108 plus 162 plus 54 plus 36 is 360.

So the answer is right!

Let's look back.

First: find the total.

Then: each part of 360°.

Then: draw the circle graph.

Last: check.