SOLUTION: triangle rst is similar to triangle abc. if the perimiter of triangle rst is 28 inches, determine the length of tr. Ab = 7 in, bc = 5 in, ca = 9 in Thanks!

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Question 847592: triangle rst is similar to triangle abc. if the perimiter of triangle rst is 28 inches, determine the length of tr.
Ab = 7 in, bc = 5 in, ca = 9 in

Thanks!
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Perimeter of abc is 21in   28%2F21+=+4%2F3

4%2F3=+tr%2F9      | Cross Multiplying to solve

 tr = 36/3 = 12in