Question 430093
If I understand you correctly, your triangle is JLK with JL = 4 and LK = 12.


Angle K is in between the hypotenuse of JK and the bottom line of LK.


That would make the angle JKL.


the opposite side of angle K is JL which is equal to 4.


the adjacent side of angle K is LK which is equal to 12.


the tangent of angle K is equal to 4/12.


you would take tan^-1 of (4/12) to get an angle of 18.43494882 degrees which rounds down to 18 degrees.


this would be selection D, if I understood you correctly.