Answer:
2 units
Explanation:
If given the radius,
, of a circle, we can easily find the diameter. Consider this:
Every circle has a center. We may draw a line from this center to any point on the circle. This line will represent our radius.
Now, we may continue this line to another edge of
the circle. If this line does not bend, then it represents our circumference.
That is all the circumference is: a straight line from one point on a circle to another, passing through the center of our circle. This can be thought of as two radii.
Therefore,
.