The answer would be equilateral
DO NOT use logical appeal. I love to write narratives, so I know that dialogue, sensory details, and descriptions are all important. In fact, logical appeal is an advertising technique, so it really wouldn't even involve writing a narrative.
The correct answer is a:
Et tu, Brute?
it means "you too, Brutus" and refers to the fact that he did not expect Brutus to be against him like the other people.
The fifth amendment
example: “I PLEAD THE 5TH!!!!”