Answer:
180°
Step-by-step explanation:
JM is the diameter of the circle with center L.
[tex] \huge \red{ \boxed{\therefore m\widehat{(JKM)} = 180\degree}} \\ [/tex]
JLM is diameter so arc JKM is half of circle
measure of arc JKM = 0.5m•360° = 180°
