Answer:
3.5
Step-by-step explanation:
LJ/sin 23° = 9/sin 89°
LJ/0.39 = 9/0,99
LJ = (9*0.39)/0.99 = 3.517
LJ ≈ 3.5
∠K is about 3 times less than ∠J
so opposite sides have roughly same ratio
Only the last option, 3.5 is close to the length 3 times less than 9
