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