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Wednesday 6th May


Properties of circles

Yesterday, we started to look at the properties of a circle and you draw lots of different sizes and labelled them like the example below:

Picture 1

The circumference is the distance around the outside of the circle.

The diameter is the distance across the middle of the circle.

The radius is half of the diameter.


Using this knowledge, I want you to cut out a number of different sizes of circles, you need to label these from A-E. If you have a printer, you can print out the document attached below.

When you have cut out your circles, complete the table below (again, if you have access to a printer, you can print this document out). Otherwise you can type directly onto it or draw a similar one onto a sheet of paper.

Picture 1

Now answer the questions below:

  1. What do you notice about the radius and the diameter?
  2. So, if a circle has a radius of 20cm, what is the diameter?
  3. So, if a circle has a diameter of 56cm, what is the radius?
  4. If a tiny circle has a radius of 0.243cm, what is the diameter?