The video cuts off prior to any explanation or the correct answer. (The 15th question in the quiz is different from the last question shown in the video. Thus, no correct answer is provided.)

Although I would suspect “D” as the correct answer, the two cases that I created (a 30:60:90 triangle and a 45:45:90 triangle) gave me B) as the correct answer.

How should we approach this type of question.

Greg’s intention was to assume that ABC is a right-angled triangle and apply pattern recognition - I didn’t agree that it was rigorous enough.

This question was removed because the “correct” approach for solving the problem was to apply the sine rule, which is out of scope for the GRE.

The correct answer is B.

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How did you assume that it could be a right angle triangle because it looks like a normal Triangle. Will we get this kind of trick questions in GRE where a normal triangle will be given but we have to assume it to a right triangle and give an answer?

How would we know what to consider?

@Leaderboard Suggestions please

That is why the question was taken down, as I felt that expecting people to assume a right-angled triangle was not correct.