Question

How long is DE rounded to the nearest tenth? Enter your answer in the box.​

Answer 1

Answer:

  7.2

Step-by-step explanation:

Length AB is the difference of the horizontal dimensions shown:

  AB = GF = EF -EG

  AB = 12 -7 = 5

The triangles in the figure are all similar, so we have ...

  DE/DC = CB/AB

  DE/12 = 3/5

  DE = 12(3/5) = 7.2