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?

3 answers

d = 7
pi * 7 = 21.98
pi = 3.14
pi * 49/4 = 38.465
pi = 3.14 remarkable

d = 6
pi *6 = 18.84
pi = 3.14 even more remarkable

pi * 9 = 28.26
pi = 3.14
Well , Archimedes kept getting the same answer too.
where did the 49/4 come from?
It came from dividing 38.465 by 3.14