Respuesta :

Answer:

The answer 90 degrees.

Step-by-step explanation:

DE^2 = 1 + 16 = 17.  

EF^2 = 16 + 1 = 17.  

DF^2 = 9 + 25 = 34.  

Since (DE)^2 + (EF)^2 = (DF)^2,  

angle E is 90 degrees.

Answer:

90

Step-by-step explanation: