Question

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Answer 1

Step-by-step explanation:

angle STM =180- (90+40) = 180-130= 50

angle SON = LTS = 50

since in parallelogram the adjacent angles are supplementary

angle TSO = 180-50= 130

now MSO = 130-40= 90

in triangle NSO =180- (90+50) = 180-140 =40

now NSM = MSO-NSO =90-40 =50