What is the approximate area of the circle?
Use pi=3.14

A.

122.7 m²

B.

78.5 m²

C.

39.3 sm²

D.

19.6 m²

Question

What is the approximate area of the circle? 
Use  pi=3.14
  
   
 
  
 
  
 

 
 

  

  A. 
 
122.7  m²
   
   

 
 

  

 B. 
 
 78.5 m²
   
   

 
 

  

 C. 
 
 39.3 sm²
   
   

 
 

  

 D. 
 
 19.6 m²

anonymous · Answer

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cannaaa · Answer

Because the diameter is 12.5, the radius is 6.25 because the radius is half of the diameter. The formula for the area of a circle is A = pi*r^2, so just plug in 6.25 for r and 3.14 for pi and solve. A = 3.14* (6.25)^2 = 3.14 * 39.0625 = 122.656

This rounds out to be 122.7, which is A, the first choice.