Which expression can be used to find the area of a circle with a diameter of 80 cm?

A.
π · 402

B.
π · 160

C.
π · 80

D.
π · 40

Question

Which expression can be used to find the area of a circle with a diameter of 80 cm?	
 
 A.
π · 402
 
 B.
π · 160
 
 C.
π · 80
 
 D.
π · 40

solomonzelman · Answer

the formula for the area of a circle is  $\Huge\color{blue}{ \sf    A= πr^2}$

radius (variable "r") is twice smaller than the diameter (variable "d").

So first tell me what will the radius be in your case?
Then tell me what will "radius to the second power" equal to?

blake57roger · Answer

who gives me a anwser choice gets a metal

solomonzelman · Answer

I can't give you the answer out like that. Please follow my guidance if you want me to help you.