Help me to solve this two

Help me to solve this two 4) In the figure below, Mis the mid point ofthe line AB. Compute the othertwo angles of AABC. 5) In the figure below, the lines AB and CD are parallel and M is the mid point of AB. 400

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4)In triangle ACM,
      Angle C= 180-(angle A+angle M) 
                     = 180-(50+90)
                     = 180-140
                     = 40

In triangle CMB,
      Angle B= 180-(angle C+angle M)
                      =180- (40+90[linear pair])
                      = 180-130
                      = 50

In triangle ABC,
Angle B = 50
Angle C = 40

2) The question is incomplete, it does not state what to find or solve.
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Sorry,these are the question

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