Question

Triangle ABC is similar to triangle EDF. Find the length of BC.

Answer 1

17.5

Explanation:

Angle EDF added up equals to 37.5

12+8=20

37.5-20=17.5, so the answer is 17.5, hope this helps :)

Answer 2

BC = 5

Explanation:

since the triangles are similar then the ratios of corresponding sides are in proportion , that is

`(BC)/(DF)` =
`(AC)/(EF)` ( substitute values )

`(BC)/(7.5)` =
`(8)/(12)` ( cross- multiply )

12 BC = 60 ( divide both sides by 12 )

BC = 5