Question

the triangle ABC is similar to Triangle d e f the measures of the side lengths are in cm which proportional can be used to find the length of EF in cm

Answer 1

We were told that

traingle ABC is similar to triangle DEF

This means that the ratio of corresponding sides is equal. This means that

AB/DE = BC/EF = AC/DF

10/20 = 6/EF = 7/14

Thus, the proportion that can be used to find the length of EF is

6/EF = 1/2