 Test your knowledge on Pi

Use this quiz to help revise and test your knowledge on Pi and how to use it.

2.14
3.14
31.4
3.4

2πr
πr
πr2

1252cm2.
1242.86cm2.
1252.86cm2.
1242cm2.

345.575191895
345
325.575191895

Tick all the correct formulas for finding the circumference of the circle

Select the two correct answers
πd
2πd
d
2πr
πr
πr2
π2r

Grace and Scarlet each have a circular pond in there garden. Grace's pond has a diameter of 6mScarlet's pond has a diameter of 3mfind the circumference of each pond.

The circumference of Grace's pond is 18.84m and the circumference of Sacrlet's pond is 9.42m.
The circumference of Grace's pond is 18.84m and the circumference of Sacrlet's pond is 9.50m.
The circumference of Grace's pond is 18.34m and the circumference of Sacrlet's pond is 9.42m.
The circumference of Grace's pond is 18.34m and the circumference of Sacrlet's pond is 9.50m.

πr² is the formula to find what?

The circumference of a circle
the surface area of a cylinder
the area of a circle
the volume of a cylinder