Question

he formula for the circumference of a circle is C = 2πr.

What is the circumference of the circle shown? (in terms of π)
Responses
A 2π ft2π ft
B 4π ft4π ft
C 6π ft6π ft
D 12π ft12π ft
Question 2
The formula for the area of a circle is A = π
.

What is the area of the circle shown? (in terms of π)
Responses
A 3π
3π ft 2
B 6π
6π ft 2
C 9π
9π ft 2
D 18π

Answer 1

If the circle's radius is 3 ft (diameter 6 ft):

Circumference = 2πr = 2π(3) = 6π ft → choice C.

Area = πr^2 = π(3^2) = 9π ft^2 → choice C.