Below are three circles.
The circumference and diameter of each circle have been approximately measured.
Circle 1:
Circle 2:
Circle 3:
Circumference: 17.281 units Circumference: 19.633 units Circumference: 47.139 units
Diameter: 5.5 units Diameter: 6.25 units Diameter: 15 units
(a) Use the measurements above and the calculator to fill in the blanks
Write each answer as a single decimal. Do not round.
Da
Circle 1:
Circle 2:
Circle 3:
X
Circumference
Circumference –
3.1
3.1
Circumference
Diameter
Diameter
Diameter
(b) Let C represent the circumference of any circle and d represent the diameter.
Using the fact that is approximately 3.14, which formula seems reasonable?