The circumference of a circle is 8pi inches. find its radius and area.

Question

anonymous · Answer

Hint: $$\Large circumference=2\pi(radius)\
\Large Area=\pi r^{2}$$

anonymous · Answer

can you walk me through it

anonymous · Answer

you have the circumference. Plug it into the equation above & simplify to get the radius. Once you have the radius, compute the area using the second equation.

unklerhaukus · Answer

$$C=2\pi r$$
$$\frac{C}{2\pi}=r$$

anonymous · Answer

unkleRhaukus what is the area

anonymous · Answer

c/2pi is not correct

anonymous · Answer

It most certainly is.

anonymous · Answer

it should be correct

anonymous · Answer

i mean, c/2pi gives the radius in inches.

unklerhaukus · Answer

$$A=\pi r^2$$

unklerhaukus · Answer

$$A=\pi\left(\frac C{2\pi}\right)^2$$

anonymous · Answer

look if the circumference in this case is 8 and the circumference of a circle is $$2\pi r$$ then in this case  $$2\pi r =8\pi$$ so $$r = 8\pi/2\pi $$
then put the value of r in the area equation

anonymous · Answer

I do not know what is going on but i am going to do another similar problem because they say both answers are wrong

anonymous · Answer

hello you still there

unklerhaukus · Answer

.

anonymous · Answer

circumference of a circle is 8pi inches:
           C = 2π r  = 8π
                  -> r  =   ....?

@cdelomas Can you find the radius?