Answer:
x = 8.12
Step-by-step explanation:
36+x^2 = y^2
121 + x^2 = z^2
z^2 + y^2 = 289
(121+x^2)+(36+x^2) = 289
157 + 2x^2 = 289
2x^2 = 132
x^2 = 66
HOPE THIS HELPS!!!
