Question

If the circumference of circle X
𝑋
is 12π
12
𝜋
and the circumference of circle Z
𝑍
is 6π
6
𝜋
, then what is the scale factor from X
𝑋
to Z
𝑍
?(1 point)
Responses

3:1
3
:
1

ratio of 3 to 1

1:2
1
:
2

ratio of 1 to 2

1:3
1
:
3

ratio of 1 to 3

2:1
2
:
1

ratio of 2 to 1

Answer 1

1:2

Reason: linear scale factor equals ratio of circumferences (or radii), 6π / 12π = 1/2, so scale factor from X to Z is 1:2.