Question

I don't know where to start

Answer 1

The above triangle has a right angle and a 45 degree angle. So the last angle is 45. Since both sides are the same angles, both have same length
x = 14√2
use pythagorean theorem. the middle line is 28.
use sine rule
y/sin30 = 28/sin 90
and
z/sin60 = 28/sin90
y = 14
z = 14√3