An Elementary Proof of Feuerbach's Theorem

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Authors

DOI:

https://doi.org/10.18311/jims/1924/17659

Abstract

Let O be the centre of the circum-circle of the ΔABC, A1 the midpoint of BC and EA1 OF the diameter perpendicular to BC. Draw AX perpendicular to BC and in it take H, the ortho-centre of the Δ : produce AX to meet the circumcircle in K.