1. The problem states that the angle of 78 degrees is angle PBA, not angle PBO. 2. To clarify, angle PBA means the angle formed at point B by points P and A. 3. This distinction is important because angles are named by three points, with the vertex point in the middle. 4. So, angle PBA \neq angle PBO since the third point differs (A vs O). 5. Therefore, any calculations or reasoning involving the angle should use 78 degrees for angle PBA only, not for angle PBO. 6. This ensures accuracy in geometric or trigonometric problems involving these points.