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Problem 257. Equilateral Triangle, Circumcircle, Point, Vertices, Side, Distances, Squares. Level: High School, College, SAT Prep.

The figure shows an equilateral triangle ABC inscribed in a circle. If a point D is on the circumcircle, DA = d, DB = e, DC = f, and AB = a, prove that Equilateral triangle formula. View or post a solution

Elearning 256: Equilateral triangle inscribed

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