1. Investigating circles

2. Draw 6 circles, each with a different radius, e.g. 2cm, 3cm, 4cm, 5cm, 6cm, 7cm. Measure the diameter and radius of each circle Use some other circular objects, e.g. water bottle, tin can, roll of sticky tape. For each object measure the diameter and circumference. Record your results in a table.

3. Investigating circumference and diameter. DiameterCircumference Using a suitable scale, label the axes and plot your values on a graph for each of your circles and objects. Circumference / Diameter

4. Draw a line of best fit. Should it go through (0,0)? What relationship does your graph show between the circumference and diameter? Circumference (cm) Diameter (cm)