Respuesta :

The answer to this question is D. 6.4

First you find angle F. 180-90= 90. 90-62= 28.
Next. Since you are finding line DE, you can use sine or tangent. I used tangent. Let x = DE.
tan(28) = x/12
12tan(28) = x
6.38 = x
6.4 = x