Robby Findler 7282e19178 tightened up the check on polygon to make sure the posns contain reals ... closes PR 10997		2010-12-25 20:33:33 -06:00
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scribblings	tightened up the check on polygon to make sure the posns contain reals	2010-12-25 20:33:33 -06:00
batch-io.ss	change teachpack names (visible to students) back to .ss	2010-04-28 06:56:26 -06:00
image.ss	Added a second column for the 2htdp teachpacks to the choose-a-teachpack dialog	2010-09-07 17:34:08 -05:00
universe.ss	change teachpack names (visible to students) back to .ss	2010-04-28 06:56:26 -06:00