Arithmetic Teacher (1972) Vol. 19, No. 2

  • Arithmetic Teacher (1972) Vol. 19, No. 2

    An official journal of THE NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS FEBRUARY 1972 L..-----1 Volume 19, Number 2 A "limited" approach to the sum of the angles of a triangle James V. Bruni Using stream flow to develop measuring skills Carlton W. Knight and James P. Schweitzer Geometry through inductive exercises for e