Question: perpendicular bisector of a triangle

Answer: A line (or ray or segment) that is perpendicular to a side of the triangle at the midpoint of the side

Question: concurrent lines

Answer: Three or more lines that intersect at a common point

Question: point of concurrency

Answer: The point of intersection of concurrent lines

Question: point of concurrency of the 3 perpendiculat bisectors is INSIDE the triangle

Answer: Acute triangle

Question: point of concurrency of the 3 perpendicular bisector is ON the triangle

Answer: Right triangle