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Don’t use for points or will take it back

Answer:
60°
Step-by-step explanation:
Angles in a triangle add up to 180°
80°+40°=120
180-120=60°
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