Angle bisector would be the answer
Step-by-step explanation:

Answer: k=-1/x^2+2
Step-by-step explanation:
Answer:
x = 19.6
Step-by-step explanation:
By applying cosine rule in ΔBCD,
cos(30)° = 
= 

BC = 
Now, by applying sine rule in ΔBAC,
sin(45)° = 


x = 
x = 19.59
x ≈ 19.6
I'm not sure what this question means exactly, maybe the principals goal is unrealistic?