Answer:
Option D is correct.
side DF = 13 units
Step-by-step explanation:
Using Pythagoras theorem:
....[1]
In a right angle triangle DEF:
FE = 12 units and DE = 5 units.
Using Pythagoras theorem on DEF we have;
Hypotenuse side = DF
Opposite side = DE and Adjacent side = FE
Substitute these in [1] we have;
⇒ units.
Therefore, the side DF = 13 units