# Test your knowledge on Pi

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

published on May 13, 20145 responses 0
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### 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
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1252cm2.
1242.86cm2.
1252.86cm2.
1242cm2.
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Hint: 2 choices
πd
2πd
d
2πr
πr
πr2
π2r
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2.14
3.14
31.4
3.4
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345.575191895
345
325.575191895
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2πr
πr
πr2
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### 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.