Mathematics Teacher (1969) Vol. 62, No. 3

  • Mathematics Teacher (1969) Vol. 62, No. 3

    MARCH 1969 VOLUME LXII. NUMBER 3 The Dilemma in Geometry C'arl B. Allendoerfer Systems in Nonmathematical Disciplines /,ouise U. White and Virginia H. Baker Digital Sums of Perfect Numbers and Triangular Numbers Robert IV. Prielipp Signed Numbers: A "Product" of Misconceptions Stephen I. Brown .. ' z In this new second