Answer:
marked angles (K, M): 63°, unmarked angles (L, N): 117°
Step-by-step explanation:
Opposite angles are congruent in a parallelogram.
5x -12° = 3x +18°
2x = 30°
x = 15°
3x +18° = 3(15°) +18° = 63°
Angles K and M are 63°; angles L and N are supplementary, 117°.
