Cory, You forgot: - A parallelogram with all four sides equal, and all four corners equal (and hence 90 degrees).
:-D Igor Thu Feb 19 14:40:45 EST 2009 Cory Papenfuss wrote: > > Oh, c'mon now. Next thing you'll be telling us that a square is a > > rhombus, or a trapezoid. > > > I (somewhat) hate adding to this pedantism, but a square can be > accurately called > > - A rectangle with equal-length sides > - A rhombus with 90 degree corners > - A trapezoid that has (the required) two parallel sides, as well as two > more (optionally) parallel sides.[1] > > [1] Possibly not, as sometimes, the definition of a trapezoid requires > *exactly* two parallel sides, not *at least* two parallel sides. > > Characteristics being sufficient does not mean necessary nor vice > versa. > > :-) > -Cory -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
