What is the best estimate of the circumference of this circle?

D. 18 units

Step-by-step explanation:

This is because . . .

C = 2 * pi * r

Since r = 3 . . .

2 * 3 * 3.1415926 . . .

2 * 3 * 3 = 18 units

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D . 18 units

Step-by-step explanation:

We know that the circumference of the circle is given by :-

, where r is the radius of the circle.

Given : The radius of  the circle = 3 units

Then , the circumference of the circle will be :-

We know the the value of , we estimate the value of  

Hence, the the best estimate of the circumference of this circle is 18 units.

3x3 = 9 and 2x2 = 4

step-by-step explanation: