As shown in the figure, straight lines a and b intersect at point O. If angle 1 is equal to 50.0, then angle 2 is equal to ()
Choices:
A:50°
B:40°
C:140°
D:130°
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: As shown in the figure, straight lines a and b intersect at point O. If angle 1 is equal to 50.0, then angle 2 is equal to ()
Choices:
A:50°
B:40°
C:140°
D:130°
Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
Question: As shown in the figure, straight lines a and b intersect at point O. If angle 1 is equal to 50.0, then angle 2 is equal to ()
Choices:
A:50°
B:40°
C:140°
D:130°