What details? You didn't provide a picture or anything.
Please elaborate on your question
The answer is C. "the man's behavour led me to guess...upset in someone."
Sentences A and B describe the actions and manners, showing the man's behaviour and anxiety: casting quick glances, his foot beating on the hot pavement etc. appearing he could even explode with anger. At some point (C), <em>he changed and just got calm, wainting silently, leading the speaker to wonder if the cause of all this could be the bus' delay.</em>
Answer:
Chords that have an equal length are called congruent chords. An interesting property of such chords is that regardless of their position in the circle, they are all an equal distance from the circle's center. The distance is defined as the length of a perpendicular line from a point to a line.
