Mathematics Teacher (1994) Vol. 87, No. 1

  • Mathematics Teacher (1994) Vol. 87, No. 1

    m JANUARY 1994 • Volume 87 Number 1 NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS 7 ~ foi=J.--~ ~.,_____, ~---+-----7 ~--~ ~---1--1 ~-~ ~ ~::::::==~ ------~-----~ 4il=----+-~ ~--~ "'"-=:::::::::::=t:? ~==~ STANDARDS • GRAPHING CALCULATOR • SLOPE lijj About the cover The cover shows various polygoon generated by two perpe