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  2. Pyramid scheme - Wikipedia

    en.wikipedia.org/wiki/Pyramid_scheme

    The pyramid scheme in the picture in contrast is a geometric progression 1 + 2 + 4 + 8 = 15. Many pyramids are more sophisticated than the simple model. These recognize that recruiting a large number of others into a scheme can be difficult, so a seemingly simpler model is used.

  3. Pyramid (geometry) - Wikipedia

    en.wikipedia.org/wiki/Pyramid_(geometry)

    A right pyramid is a pyramid whose base is circumscribed about a circle and the altitude of the pyramid meets the base at the circle's center; otherwise, it is oblique. [12] This pyramid may be classified based on the regularity of its bases. A pyramid with a regular polygon as the base is called a regular pyramid. [13]

  4. Penrose triangle - Wikipedia

    en.wikipedia.org/wiki/Penrose_triangle

    Penrose triangle. The Penrose triangle, also known as the Penrose tribar, the impossible tribar, [1] or the impossible triangle, [2] is a triangular impossible object, an optical illusion consisting of an object which can be depicted in a perspective drawing.

  5. File:Pyramid scheme.svg - Wikipedia

    en.wikipedia.org/wiki/File:Pyramid_scheme.svg

    English: The unsustainable geometric progression of a classic pyramid scheme, ... Pyramid scheme fin.svg: SVG development . The SVG code is . This diagram was created ...

  6. File:Pyramid scheme diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Pyramid_scheme...

    Date/Time Thumbnail Dimensions User Comment; current: 14:48, 24 January 2022: 904 × 581 (112 KB): Belbury: Uploaded a work by Security and Exchange commission, U.S. Federal Govt.<br/>This vector version by {{U|Mysid}} from Vectorized from Image:PyramidSchemeMS.jpg, and removed one phrase to make less US-centric. with UploadWizard

  7. Pyramidal number - Wikipedia

    en.wikipedia.org/wiki/Pyramidal_number

    Geometric representation of the square pyramidal number 1 + 4 + 9 + 16 = 30. A pyramidal number is the number of points in a pyramid with a polygonal base and triangular sides. [1] The term often refers to square pyramidal numbers, which have a square base with four sides, but it can also refer to a pyramid with any number of sides. [2]

  8. 8 Warning Signs of a Pyramid Scheme - AOL

    www.aol.com/8-warning-signs-pyramid-scheme...

    Many pyramid schemes and MLM schemes emphasize the importance of recruiting new participants. Programs that emphasize recruiting participants, and paying a fee, to join the program are likely ...

  9. Construction of the Egyptian pyramids - Wikipedia

    en.wikipedia.org/wiki/Construction_of_the...

    His scheme involves using a regular external ramp to build the first 30% of the pyramid, with an "internal ramp" taking stones up beyond that height. [49] The stones of the external ramp are re-cycled into the upper stories, thus explaining the otherwise puzzling lack of evidence for ramps.