Question

1. What is the circumference of a circle with a radius of 3? (1 point)
3
6
9
12
15
2. What is the area of a circle with a radius of 3? (1 point)
3
6
9
12
15
3. What is the circumference of a circle with a diameter of 4? (1 point)
4
8
12
16
24
4. What is the area of a circle with a diameter of 4? (1 point)
4
8
12
16
24
5.
In the figure above, if A is the center of the circle, what is the value of x?
(1 point)
31
37
47
54
59
6.
In the figure above, the ratio of the circumference of circle A to the length of arc DBC is 6:1.
What is the value of x?

Answer 1

1. $6 \pi$
This is because 
$c= \pi d \\ c= 6 \pi$

2. $9 \pi$
because 
$A= \pi r^{2} \\ A = \pi (3)^{2} \\ A = 9 \pi$

3. $4 \pi$
$C= \pi d \\ C= 4 \pi$

4. $4 \pi$
$A = \pi r^{2} \\ A = \pi (2)^{2} \\ A = 4 \pi$

Can't really answer the last 2 w/o the figures