Two triangles have a shared vertex with three annotated points A, B, and C. Find the measure of \angle 2 if A B \perp B C.
Choices:
A:64
B:68
C:72
D:76
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: Two triangles have a shared vertex with three annotated points A, B, and C. Find the measure of \angle 2 if A B \perp B C.
Choices:
A:64
B:68
C:72
D:76
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: Two triangles have a shared vertex with three annotated points A, B, and C. Find the measure of \angle 2 if A B \perp B C.
Choices:
A:64
B:68
C:72
D:76