The On-Line Encyclopedia of Bongard Problems

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BP238

C-like curves point to the same direction vs. c-like curves point to opposite directions.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP233 BP234 BP235 BP236 BP237 * BP239 BP240 BP241 BP242 BP243`
	KEYWORD	`unorderedpair, traditional`
	CONCEPT	`tangent (info \| search),` `line_absolute_direction (info \| search),` `absolute_direction (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `same_feature (info \| search),` `same (info \| search),` `direction (info \| search)`
	AUTHOR	`Harry E. Foundalis`

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`

BP240

Straight line joining the curve ends does not cut the curve vs. straight line joining the curve ends intersects the curve.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP235 BP236 BP237 BP238 BP239 * BP241 BP242 BP243 BP244 BP245`
	KEYWORD	`traditional`
	CONCEPT	`x-crossing (info \| search),` `line_or_curve_endpoint (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search)`
	AUTHOR	`Matthew J. Howells`

BP245

Can be completed to be made into a rectangle vs. cannot be completed to be made into a rectangle.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP240 BP241 BP242 BP243 BP244 * BP246 BP247 BP248 BP249 BP250`
	KEYWORD	`traditional`
	CONCEPT	`imagined_line_or_curve (info \| search),` `imagined_entity (info \| search)`
	AUTHOR	`Carla Rispoli`

BP249

Dashed lines form the same shape centered inside vs. not so.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP244 BP245 BP246 BP247 BP248 * BP250 BP251 BP252 BP253 BP254`
	KEYWORD	`traditional`
	CONCEPT	`inside (info \| search),` `imagined_point (info \| search),` `imagined_entity (info \| search),` `similar_shape (info \| search),` `similar (info \| search),` `curve_texture (info \| search),` `texture (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

BP250

Tetrahedron projected on the box plane vs. not so.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP245 BP246 BP247 BP248 BP249 * BP251 BP252 BP253 BP254 BP255`
	KEYWORD	`stretch, traditional, left-couldbe`
	CONCEPT	`number (info \| search),` `3d_solid (info \| search),` `imagined_point (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

BP257

The distance from the center of the line to the bottom of the square is the same as the distance from the dot to the right edge of the square vs. not so.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP252 BP253 BP254 BP255 BP256 * BP258 BP259 BP260 BP261 BP262`
	KEYWORD	`convoluted, notso, boundingbox, traditional, absoluteposition`
	CONCEPT	`bounding_box (info \| search),` `length_line_or_curve (info \| search),` `midpoint (info \| search),` `imagined_point (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `same_feature (info \| search),` `same (info \| search),` `distance_from_center (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

BP261

Straight lines that join filled and outlined circles intersect vs. straight lines that join filled and outlined circles do not intersect.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP256 BP257 BP258 BP259 BP260 * BP262 BP263 BP264 BP265 BP266`
	KEYWORD	`noisy, traditional`
	CONCEPT	`x-crossing (info \| search),` `outlined_filled (info \| search),` `feature_cluster (info \| search),` `cluster (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `texture (info \| search)`
	AUTHOR	`Michael Ihde`

BP273

Stays put (both when placed on its top and bottom) vs. tumbles (when placed on its bottom).

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	CROSSREFS	`See BP199 for the original "stays put vs. tumbles".` `Adjacent-numbered pages: BP268 BP269 BP270 BP271 BP272 * BP274 BP275 BP276 BP277 BP278`
	KEYWORD	`rotate, physics`
	CONCEPT	`base (info \| search),` `downward_upward (info \| search),` `tumbles_or_stays_put (info \| search),` `line_absolute_direction (info \| search),` `absolute_direction (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `direction (info \| search),` `gravity (info \| search)`
	WORLD	`arial_font_centered_connected_symbol [smaller \| same \| bigger]`
	AUTHOR	`Merse E. Gáspár`

BP275

Straight line joining the ends does not intersect the object vs. straight line joining the ends intersects the object.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP270 BP271 BP272 BP273 BP274 * BP276 BP277 BP278 BP279 BP280`
	CONCEPT	`imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `object_line_overlap (info \| search),` `overlap (info \| search)`
	WORLD	`arial_font_centered_connected_symbol [smaller \| same \| bigger]`
	AUTHOR	`Merse E. Gáspár`

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