Is the triangle that this question is speaking of unique, or could there be multiple cases?
"Let O be the circumcenter of ΔABC. Suppose OA and OB are perpendicular to each other. What is the measure of ∠C?

Question

Is the triangle that this question is speaking of unique, or could there be multiple cases? 
"Let O be the circumcenter of ΔABC. Suppose OA and OB are perpendicular to each other. What is the measure of ∠C?

anonymous · Answer

Solving the problem is easy, but I just am worried that there could be multiple cases, one in which the triangle could be acute and one in which the triangle could be obtuse. I don't think this problem is possible were the triangle to be a right triangle.

phi · Answer

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