△ABC is similar to △DEF . AB=5 inches, BC=9 inches, and DE=7.5 inches. What is EF ?

asked Jun 24, 2019 81.6k views

1 vote

△ABC is similar to △DEF .

AB=5 inches, BC=9 inches, and DE=7.5 inches.

What is EF ?

by Rupps

8.0k points

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6 votes

I think the answer is 13.5. △DEF is 1.5 times bigger than △ABC

Robin Kuzmin answered Jun 27, 2019

8.5k points

4 votes

Similar triangles have corresponding sides with proportional lengths.

AB/BC = DE/EF

5/9 = 7.5/EF

5(EF) = 9 * 7.5

5(EF) = 67.5

EF = 13.5

Anekdotin answered Jun 29, 2019

6.6k points

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