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  2. Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Missing_square_puzzle

    However, the blue triangle has a ratio of 5:2 (=2.5), while the red triangle has the ratio 8:3 (≈2.667), so the apparent combined hypotenuse in each figure is actually bent. With the bent hypotenuse, the first figure actually occupies a combined 32 units, while the second figure occupies 33, including the "missing" square.

  3. RYB color model - Wikipedia

    en.wikipedia.org/wiki/RYB_color_model

    RYB (an abbreviation of redyellowblue) is a subtractive color model used in art and applied design in which red, yellow, and blue pigments are considered primary colors. [1] Under traditional color theory , this set of primary colors was advocated by Moses Harris , Michel Eugène Chevreul , Johannes Itten and Josef Albers , and applied by ...

  4. ROYGBIV - Wikipedia

    en.wikipedia.org/wiki/ROYGBIV

    Isaac Newton's color sequence (red, orange, yellow, green, blue, indigo, violet) is kept alive today by several popular mnemonics. One is simply the nonsense word roygbiv, which is an acronym for the seven colors. [5] This word can also be envisioned as a person's name, "Roy G. Biv". [6]

  5. Manipulative (mathematics education) - Wikipedia

    en.wikipedia.org/wiki/Manipulative_(mathematics...

    For example, three green triangles make a red trapezoid; two red trapezoids make up a yellow hexagon; a blue rhombus is made up of two green triangles; three blue rhombi make a yellow hexagon, etc. Playing with the shapes in these ways help children develop a spatial understanding of how shapes are composed and decomposed, an essential ...

  6. STAR (software) - Wikipedia

    en.wikipedia.org/wiki/STAR_(software)

    STAR Reading, STAR Early Literacy and STAR Math are standardized, computer-adaptive assessments created by Renaissance Learning, Inc., for use in K–12 education. Each is a " Tier 2 " assessment of a skill (reading practice, math practice, and early literacy, respectively that can be used any number of times due to item-bank technology.

  7. AOL Mail

    mail.aol.com/d?reason=invalid_cred

    You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.

  8. Analogous colors - Wikipedia

    en.wikipedia.org/wiki/Analogous_colors

    Red, orange, and red-orange are examples. The term analogous refers to having analogy, or corresponding to something in particular. This color scheme strength comes to the fact that it lacks contrast as in comparison to its counterpart, the complementary schemes. [citation needed] Analogous color differ depending on the color wheel used.

  9. RYB Education - Wikipedia

    en.wikipedia.org/wiki/RYB_Education

    RYB Education (Chinese: 红黄蓝教育; NYSE: RYB) is a publicly listed company for preschool education in the People's Republic of China.As measured by annual total revenues in 2016, the company is the largest provider of early childhood education service in China. [1]