Respuesta :

The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle. If a circle has a diameter of 4, its circumference is 3.14*4=12.56. If you know the radius, the diameter is twice as large.

Answer:

17.9

Step-by-step explanation:

Area of a circle= C^2/4pi

15^2= 225

4(3.14)=12.56

225/12.56= 17.9