Answer:
Answer 3rd option: 142
Step-by-step explanation:
L and J have the exact same angle (I believe) and so do K and M.
With that angle, (haha funi pun) you can then subtract 360 (the total degrees of a quadrilateral) 76 (L and J's degrees combined) and get 284. If K and M are both equal you can just divide 284/2 (the two angles since they are both equal) and get 142.
Not certain, but pretty sure.
=)
