calculation of the perimeter of a circle
The perimeter of a circle is given by the formula `P=2*pi*r`, where r is the radius of the circle.
Give an approximate value to 2 decimal places of the perimeter of a circle of radius 15.
Give an approximate value to 2 decimal places of the perimeter of a circle of radius 15.
This type of exercise can be solved using the function : perimeter_circle
Course reminder : Geometry