Draw a triangle. At one of the vertices, draw a line through it that bisects the angle. At each of the other two vertices, draw a line through it which is perpendicular to the line that bisects its angle. The three lines meet at a point. What is the proper, formal name of this point?
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asked Jun 21, 2023 at 12:24
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$\begingroup$ excenter or excentre, depending on your preferred spelling of "center/centre". en.wikipedia.org/wiki/Incircle_and_excircles_of_a_triangle $\endgroup$– Noam D. ElkiesCommented Jun 21, 2023 at 14:38
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$\begingroup$ I'm so sorry I wouldn't have asked such a ditzy question had I known that the great Noam Elkies of all mathematicians would've answered. Thank you so much! $\endgroup$– Benjamin L. WarrenCommented Jun 22, 2023 at 1:27
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