Which circles have an area of 16pi in^2?

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.

Question

Which circles have an area of 16pi in^2?
 
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.

sepeario · Answer

Do you know the formula for the area of a circle?

iluvsoccer · Answer

Yes Mr. Bean. xD :P No offense. Just pulling your legs.

sepeario · Answer

Ok what gives us 16 when we square it?

iluvsoccer · Answer

8

sepeario · Answer

Think again.. 8 squared doesn't equal 16.

iluvsoccer · Answer

4.

anonymous · Answer

o3o yep your right 4x4=16 ^~^

anonymous · Answer

Sorry. I switched accounts. That account is lagging.

anonymous · Answer

area = pi r^2
      pi r^2=16 pi      
          r^2=16
          r= sqrt(16)=4

iluvsoccer · Answer

@jabez177

jabez177 · Answer

Awesome job!

jabez177 · Answer

Thanks for your help!