Answer:
x = 14, y = 7√3, z = 7√2
Explanation:
In an isosceles right triangle, the length of the hypotenuse is √2 times the length of a leg. In a 30°-60°-90° right triangle, the length of the longer leg is √3 times the length of the shorter leg, and the length of the hypotenuse is twice the length of the shorter leg. So x = 14, y = 7√3, and
z = 7√2.