12. Using a piece of string, measure the circumference and diameter of each of these circles. Record your results in a table, as shown below.


A B D C


Circle


A B C D


13. Look at your results in the table in question 12 and decide approximately how many times bigger the circumference is than the diameter in each case.


14. Using a calculator, divide your circumference by your diameter for each of the circles in question 12. What do you notice?


15. Can you find an approximate circumference for circles with the following diameters? a) diameter = 6cm


b) diameter = 10cm c) diameter = 9.1cm


16. Using a piece of string, measure the circumference of these objects. Note the diameter of each object too.


a) jar c) cup


b) paint bottle d) trundle wheel


17. Examine how these circle designs were made and try a few of your own. a)


b)


Circumference


Diameter


2-D Shapes 2


93


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