Find the length of the diameter given the radius is 5.

Two legs of a right triangle measure 3 and 4, respectively. What is the area of the circle that circumscribes the triangle?

The perimeter of a circle is 36 π. What is the diameter of the circle?

The area of a circle is . Find the diameter.

If the area of the circle touching the square in the picture above is , what is the closest value to the area of the square?

Find the length of the diameter given radius of 1.

If the area of a circle is four times larger than the circumference of that same circle, what is the diameter of the circle?

The circumference of the circle is . What is the diameter?

Find the diameter of a circle whose area is .

Find the diameter of a circle given the radius is 6.