Question

Please help me, What is the length of DE?

Answer 1

B

Explanation:

The 2 triangles are similar, so the corresponding sides are in proportion, that is

`(DE)/(XY)` =
`(FD)/(ZX)` , substitute values

`(DE)/(9)` =
`(8)/(12)` ( cross- multiply )

12 DE = 72 ( divide both sides by 12 )

DE = 6 → B