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In this lesson, we will learn how to find the circumference of a circle using the formula 2Οr.

Q1:

Answer the following questions for the circle shown.

Work out the circumference giving your answer in terms of π .

Work out the area of the circle giving your answer in terms of π .

Q2:

Using 2 2 7 to approximate π , what is the difference in circumference between a circle of diameter 63 cm and one of diameter 49 cm?

Q3:

Work out the circumference of a circle with a diameter of 10 inches, giving your answer to two decimal places.

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