A arc of a circle measures . Give the radius of this circle.

The arc of a circle measures . The chord of the arc, , has length . Give the length of the radius of the circle.

The arc of a circle measures . The chord of the arc, , has length . Give the length of the radius of the circle.

The points and form a line which passes through the center of circle Q. Both points are on circle Q.

To the nearest hundreth, what is the length of the radius of circle Q?

Two circles in the same plane have the same center. The larger circle has radius 10; the area of the region between the circles is . What is the radius of the smaller circle?

Two circles in the same plane have the same center. The smaller circle has radius 10; the area of the region between the circles is . What is the radius of the larger circle?

If the circumference of a circle is , what is its radius?

If the area of a circle is , what is its radius?

A square and a circle have the same area. What is the ratio of the length of one side of the square to the radius of the circle?

Given that the area of a circle is , determine the radius.