Explanation:
To fill in the circles with the missing information and find the area, we'll need to use the formulas for the area of a circle and the circumference of a circle.
Let's say we have a circle with a missing radius.
We can find the area and the circumference of the circle using the given information.
To find the missing radius, we need to know either the area or the circumference of the circle.
Once we have the missing radius, we can use it to find the missing area.