Considering that the angles are opposite by the same vertex, the relationship between angles B and C is given by:
Vertical Angles.
Researching this problem on the internet, it is found that there is a vertex, and angles are diagonal, also called opposite by the same vertex. These angles are also called vertical angles, hence this is what describes the relationship between these angles.
More can be learned about angles that are opposite by the same vertex at https://brainly.com/question/1673457
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