What is the area of the toy bicycle wheel if the radius is 1 inch ?

1)  The area, in terms of "π" , is:  " 1π  in.² "  .

2)  The area, using the approximation of  "3.14"  for "π" , is:  " 3.14 in.²  " .
 
Explanation:

The formula/equation of the area of a circle, "A":

A = π * r² ;
 
 in which π ≈ 3.14 ; 
               A = Area; 
               r = length of radius = 1 in. (given). 


  To find the area, take our known values, and plug them into the formula to find our

1)  To solve for the Area, in terms of "π" ;

   
   A = π * r²  = π *(1 in.) ² = π * 1 in² ;
 
   A = 1π  in.²  .

2) To solve for Area, using the approximation of "3.14"  for "π"  :

   A = π * r² ;
 
   A ≈ (3.14) * (1 in.)²  =  (3.14) * (1²) * (in.²)  ;
      =  (3.14)*(1)*(in.²)  ;

   A ≈  3.14 in.²