Respuesta :

mathstudent55

Answer:

D

Step-by-step explanation:

There is a linear pair at each vertex.

m<1 + 140 = 180

m<1 = 40

m<2 + 105 = 180

m<2 = 75

m<3 + 75 = 180

m<3 = 105

m<4 + 40 = 180

m<4 = 140

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