The Theorem of Thales
In geometry, Thales' theorem states that if A, B and C are points on a circle where the line AB is a diameter of the circle, then the angle ∠ACB is a right angle. Thales' theorem is a special case of the inscribed angle theorem. This GeoGebra Applet will serve the student(s) to get to understand the concept(s) and proof for the Theorem of Thales.