Please help, my computer is about to die and this is due in a few minutes. Will mark brainlist if correct

Answer:
x = 1.5
Step-by-step explanation:
Here, we want to solve for the value of x
In other to solve this, we will be using an important theorem
We have this as;
lh^2 = lj * lk
1^2 = 0.5 * (0.5 + x)
1 = 0.25 + 0.5x
1-0.25 = 0.5x
0.75 = 0.5x
x = 0.75/0.5
x = 1.5