Hello!
It is given information that this triangle is a right triangle, meaning that the Pythagorean Theorem can apply here.

We can set the length of a leg as an unknown variable
.

Remember that it is the whole
term being squared, meaning that it'll simplify to
, not
.




This means we can plug back in to find the sides.
The hypotenuse would be
, or 4.2.
And the legs would be 1.4 and 4, respectively.
Hope this helps!