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JOHN CONWAY, ALEX RYBA, The Steiner-Lehmus angle-bisector theorem, The Mathematical Gazette, Vol. 98, No. 542 (July 2014), pp. 193-203 ...
Summary We prove the next generalization of the Steiner-Lehmus theorem: if two equal cevians intersect with each other on the angle bisector of the third triangle vertex, then the triangle is ...
Learn about and revise how Pythagoras’ theorem can be used to calculate the sides of right-angled triangles with this Bitesize GCSE Maths Edexcel guide.
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