What statements apply to the term "blind spot"?

The term "blind spot" is crucial in traffic safety, particularly concerning vehicles and cyclists. The selected statements are correct because:

1. The blind spot is particularly dangerous for cyclists, as drivers often cannot see them in these areas, increasing the risk of accidents.
2. Blind spots are indeed not visible even with mirrors. This is why drivers are advised to check their surroundings physically, especially before changing lanes or turning.

Understanding these aspects is essential for enhancing road safety and minimizing accidents. The third option, regarding turning circles, is not applicable to the definition of a blind spot and does not contribute to understanding the dangers associated with it. Knowing the complete range of factors involved in blind spots can help in safe driving practices.