Arithmetic Teacher (1989-1990) Vol. 37, No. 9

  • Arithmetic Teacher (1989-1990) Vol. 37, No. 9

    DEPARTMENT READERS' DIALOGUE Hard pieces In hi!> article .. Six Hard Pieces" (October 1989. 34-35). William D. Jam<>ki asked his reader to prove the nonexistence of a square made from six tangram piece<>. Here is one argument. Let the L piece have side:. I. I. and v'2. Then every piece has ide\ of integral length or of