login
Hints
(Greetings from The On-Line Encyclopedia of Bongard Problems!)
BP239 Straight line parallel to line joining the ends of curve AND sliding the straight line suitably can make a closed area vs. straight line perpendicular to line joining the ends of curve.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP234 BP235 BP236 BP237 BP238  *  BP240 BP241 BP242 BP243 BP244

KEYWORD

traditional

CONCEPT line_or_curve_endpoint (info | search),
length_line_or_curve (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search),
imagined_motion (info | search),
motion (info | search),
same_feature (info | search),
same (info | search),
parallel (info | search),
perpendicular (info | search)

AUTHOR

Harry E. Foundalis

Welcome | Solve | Browse | Lookup | Recent | Links | Register | Contact
Contribute | Keywords | Concepts | Worlds | Ambiguities | Transformations | Invalid Problems | Style Guide | Goals | Glossary