Question

Triangle ABC is similar to triangle DEF . The length of AC is 10 cm. The length of BC is 15 cm. The length of DF is 6 cm.

What is the length of EF?

12


6


10


9

Answer 1

9 cm

Explanation:

Side lengths of similar triangles are proportional. BC is 1.5 times the length of AC, so EF will be 1.5 times the length of DF:

1.5·6 cm = 9 cm