The goal of this article is to formalize Ceva’s theorem that is in the  on the web. Alongside with it formalizations of Routh’s, Menelaus’ and generalized form of Ceva’s theorem itself are provided.
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 Agata Darmochwał. The Euclidean space. Formalized Mathematics, 2(4):599-603, 1991.
 Krzysztof Hryniewiecki. Basic properties of real numbers. Formalized Mathematics, 1(1):35-40, 1990.