New Zealand
Level 7 - NCEA Level 2
Perimeter of Circles and Sectors
Interactive practice questions
If the radius of a circle is equal to $27$27 cm, find its circumference correct to one decimal place.
Easy
< 1min
The circumference $C$C of a circle is equal to $132$132 cm and its radius is $r$r cm long. Using the approximation $\pi=\frac{22}{7}$π=227, find the value of $r$r to the nearest integer.
Easy
2min
A circular running track has a diameter of $23$23 metres. How many laps must be completed to run $1600$1600 metres?
Give your answer correct to one decimal place.
Easy
2min
What is the perimeter of a semicircle with diameter $8$8 cm, correct to two decimal places?
Easy
2min
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