Respuesta :

k393b
area of a circle
area = pi r ^2 
64 = 3.14 x r ^2
divide both sides by 3.14 
20.38 = r^2 
square root of 20.38 
4.51 = r 
diameter is twice the radius 
4.51 + 4.51 = 9.02 

Otras preguntas