JournalsemVol. 70, No. 2pp. 71–78

On the theorem of the three perpendiculars

  • Jin-ichi Itoh

    Kumamoto University, Japan
  • Joël Rouyer

    Romanian Academy, Bucharest, Romania
  • Costin Vîlcu

    Romanian Academy, Bucharest, Romania
On the theorem of the three perpendiculars cover
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Jin-ichi Itoh, Joël Rouyer, Costin Vîlcu, On the theorem of the three perpendiculars. Elem. Math. 70 (2015), no. 2, pp. 71–78

DOI 10.4171/EM/277