Respuesta :

Answer:

60°

Step-by-step explanation:

Angles in a triangle add up to 180°

80°+40°=120

180-120=60°

madethisfortwitch1

Answer:

60

Step-by-step explanation:

The angles of the traingle must add up to 180 which means that

40+80+x=180

Solve for x

120+x=180

60=x

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