The figures in the pair are similar. a. Find the scale factor of the first figure to the second. b. Give the corresponding ratio of the perimeters. c. Give the corresponding ratio of the areas.

9 in.
18 in.
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Part 1
a. The scale factor is
  
enter your response here. ​(Simplify your answer. Type an integer or a​ fraction.)

a. The scale factor is 1/2.

b. The ratio of the perimeters is

  
enter your response here. ​(Simplify your answer. Type an integer or a​ fraction.

b. The ratio of the perimeters is 1:2.

thats incorrect

b. The ratio of the perimeters is 1:1.