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Mathematics

Grade9

Easy

Question

Find the circumference of a circle with a radius of 2.

$6 π$
$4 π$
$2 π$
$π$

hint Hint:

Circumference = 2 $cross times$ radius $cross times pi$

The correct answer is: $4 pi$

Recall the formula for finding the circumference of a circle:
Circumference = 2 $cross times$ radius $cross times pi$
We can substitute in the value for the radius in order to find the circumference of the circle in question.
Circumference = $2 cross times 2 cross times pi$
Solve.
Circumference = $4 cross times pi$
Simplify.
Circumference = $4 pi$

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