Circle A has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. The diameter of circle B is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. Part A: Using the formula for circumference, solve for the value of pi for each circle. (4 points)

Part B: Use the formula for area and solve for the value of pi for each circle. (4 points)

Part C: What observation can you make about the value of pi for circles A and B?

Step-by-step explanation:

Circle A: 7in Diameter with a circumference of 21.98 inches and an area of 38.465 square inches

Circle B: : 6in Diameter with a circumference of 18.84 inches and an area of 28.26 square inches

Part A: The formula for circumference is c=2pi(r). We then want to divide diameter by two to get radius while you plug in your other values. You would then get these two equations:

     1) 21.98=2pi(3.5)      2) 18.84=2pi(3)

     21.98/(3.5)2=pi          18.84/(3)2=pi

      pi=12.56                   pi= 12.56

Part B: The formula for Area is A=pi(r^2). Since we already have our radius we can plug in all the in all the information that we have to solve for pi. The equations should be:

       1) 38.465=pi(3.5^2)           2) 28.26=pi(3^2)

        38.465/(3.5^2)=pi             28.26/(3^2) =pi

              pi= 3.14                                pi= 3.14

Part C: The obserservation to be made is find the pi of the area of a circle is going to equal to pi=3.14.