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  2. Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Missing_square_puzzle

    The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.

  3. Vanishing puzzle - Wikipedia

    en.wikipedia.org/wiki/Vanishing_puzzle

    The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.

  4. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    Missing square puzzle: The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures. Moon illusion: The Moon illusion is an optical illusion in which the Moon appears larger near the horizon than it does while higher up in the sky. Motion aftereffect: Motion illusion: Müller ...

  5. Category:Optical illusions - Wikipedia

    en.wikipedia.org/wiki/Category:Optical_illusions

    An optical illusion is any illusion that deceives the human visual system into ... Missing square puzzle; Moon illusion; ... Grey square optical illusion.PNG 1,087 ...

  6. Portal:Mathematics/Featured picture/2010 03 - Wikipedia

    en.wikipedia.org/wiki/Portal:Mathematics/...

    The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures. It depicts two arrangements of shapes, each of which apparently forms a 13×5 right-angled triangle, but one of which has a 1×1 hole in it.

  7. 'Dismembered' body of Delaware woman reported missing found ...

    www.aol.com/dismembered-body-delaware-woman...

    A Delaware woman who was reported missing last week after she didn't show up to work for several days was found dismembered in a car over the weekend, police said. A Maryland man has been arrested ...

  8. Police Abuse Complaints By Black Chicagoans Dismissed Nearly ...

    data.huffingtonpost.com/2015/12/chicago-officer...

    Investigators Rarely Sustain Allegations Of Any Kind. Sources: Invisible Institute, City of Chicago, Census Bureau, CNN Of 10,500 complaints filed by black people between 2011 and 2015, just 166 — or 1.6 percent — were sustained or led to discipline after an internal investigation.

  9. Talk:Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Talk:Missing_square_puzzle

    The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures. It depicts two arrangements of shapes, each of which apparently forms a 13×5 right-angled triangle, but one of which has a 1×1 hole in it.