Mathematics Teacher (1970) Vol. 63, No. 2

  • Mathematics Teacher (1970) Vol. 63, No. 2

    NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS FEBRUARY, 1970 VOLUi\IE LXIII, Nlji\18Eit2 Conic Sections in Relation to Physics and Astronomy Hermann von Baravalle The Expression '0' Herbert E . Vaughan An Intuitive Approach to Square Numbers George F. Edmonds The Recursion Formula J. Ga1junkel Put the pieces together wit