Question

ASAP I JUST WANT THE ANSWER

Select the correct answer.

Circle M dilated by a scale factor of 3 gives circle N. If the circumference of circle N is 6 cm, what is the circumference of circle M?




A.

54 cm

B.

3 cm

C.

2 cm

D.

18 cm

Answer 1

Explanation:

2 cm

scale factor of 3

then 6/3 = 2 cm

Answer 2

C. 2 cm

Explanation:

As the circumference is a measure of length (one dimension), we can simply divide the given circumference of circle N by the scale factor to find the circumference of circle M:

⇒ circumference of circle M = circumference of circle N ÷ scale factor

= 6 cm ÷ 3

= 2 cm

(If we were working with area, we would have to divide/multiply by the square of the scale factor, since we would be working in 2 dimensions)