Question

Which circles have an area of 16pi in2?

Choose all answers that are correct.

A. a circle with a radius of 2 in.
B. a circle with a radius of 4 in.
C. a circle with a diameter of 8 in.
D.a circle with a diameter of 16 in.

Answer 1

A = (pi) x r^2
Area = (pi) x (16) 

r^2 = 16 
t = 4 

The diameter =d=2r= 2*4 = 8 



 d=8 inches.