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? (2 points)

3.14159

Step-by-step explanation:

A) Pi value using circumferences

C = circumference

d= diameter

Formula: C = Pi*d⇒Pi = C/d

Circle A

Pi = 21.98/7 = 3.14

Circle B)

Pi = 18.84/6= 3.14

B) Using areas

A = area

r = radio = diameter/2  

Formula: A = Pi*(r^2 )⇒ Pi = A/(r^2)

Circle A

Pi = 38.465/(3.5)^2= 3.14  

Circle B

Pi= 28.26/(3^2)= 3.14

Part A

C = πd

Circle A: 21.98 = π * 7 → π = 3.14

Circle B: 18.84 = π * 6 → π = 3.14

Part B

A = πr², r = d / 2

Circle A: 38.465 = π * 3.5² → π = 3.14

Circle B: 28.26 = π * 3² → π = 3.14

Part C

An observation you can make is that the value of pi stays the same in both of the circles, therefore, it's a constant.

Step-by-step explanation: