CMR Ax // By

This image appears to depict a geometric problem involving angles and vectors, possibly in a coordinate system. The notation includes:

- \( A \) and \( B \) as points or vectors with associated angles.
- Angles are given, such as \( \widehat{A} = 125^\circ \), \( \angle AOB = 145^\circ \), and \( B = 120^\circ \).
- Relationships between vectors \( A \) and \( B \) are defined, with references to right angles and possibly parallel conditions.

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