The perimeter of a circle is called its circumference.

The diameter of a circle is 7 cm. its circumference is

If the perimeter of a square is equal to the circumference of a circle then the ratio of their areas is

The area of a circle is 49picm^(2) . Its circumference is

The radius of a circle is 4.7 cm. Find its circumference

What is the area of the square ? I. The length of the diagonal of the square is 60 cm. II. The perimeter of the square is equal to the circumference of the circle.

The radius of a circle is 10.5 cm. Find its circumference.

The area of a circle is 154 sq. cm. Find its circumference.

If the area of a circle is 9pi sq. cm then its circumference is