what is the diameter of a circle whose circomfrence is about 15.7 cm.

divide the circumference by PI

Divide the circumference by pi = 3.1416 to get the diameter

To find the diameter of a circle whose circumference is approximately 15.7 cm, you need to divide the circumference by pi (π). Pi is a mathematical constant with an approximate value of 3.1416.

So, divide the circumference (15.7 cm) by pi (3.1416) to get the diameter:

Diameter = Circumference / π

Diameter ≈ 15.7 cm / 3.1416

Diameter ≈ 5 cm

Therefore, the diameter of the circle is approximately 5 cm.