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  2. Montessori sensorial materials - Wikipedia

    en.wikipedia.org/wiki/Montessori_sensorial_materials

    Sphere; Cone; Ovoid; Ellipsoid; Triangle-based pyramid; Square-based pyramid; Cube; Cylinder; Rectangular prism; Triangular prism; The mystery bag The mystery bag contains various object that the child feels and sorts without looking into the bag. The object is removed after the child has decided how to sort it and a visual check is done.

  3. Froebel gifts - Wikipedia

    en.wikipedia.org/wiki/Froebel_gifts

    The second gift originally consisted of two wooden objects, a sphere and a cube. Fröbel called this gift "the child's delight", since he observed the joy of each child discovering the differences between the sphere and cube. The child is already familiar with the shape of the wooden sphere, which is the same as the ball of the first gift.

  4. Sphere - Wikipedia

    en.wikipedia.org/wiki/Sphere

    A sphere (from Greek σφαῖρα, sphaîra) [1] is a geometrical object that is a three-dimensional analogue to a two-dimensional circle.Formally, a sphere is the set of points that are all at the same distance r from a given point in three-dimensional space. [2]

  5. Elementary mathematics - Wikipedia

    en.wikipedia.org/wiki/Elementary_mathematics

    For example, determining the volume of a sphere requires a significant amount of integral calculus or its geometrical analogue, the method of exhaustion; [6] but, having done this once in terms of some parameter (the radius for example), mathematicians have produced a formula to describe the volume.

  6. Spherical geometry - Wikipedia

    en.wikipedia.org/wiki/Spherical_geometry

    The sum of the angles of a spherical triangle is not equal to 180°. A sphere is a curved surface, but locally the laws of the flat (planar) Euclidean geometry are good approximations. In a small triangle on the face of the earth, the sum of the angles is only slightly more than 180 degrees. A sphere with a spherical triangle on it.

  7. J. Michael Cook - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/j-michael-cook

    From January 2008 to December 2012, if you bought shares in companies when J. Michael Cook joined the board, and sold them when he left, you would have a 104.1 percent return on your investment, compared to a -2.8 percent return from the S&P 500.

  8. Refinance rates for Thursday, December 19, 2024 - AOL

    www.aol.com/finance/mortgage-and-refinance-rates...

    See today's average mortgage rates for a 30-year fixed mortgage, 15-year fixed, jumbo loans, refinance rates and more — including up-to-date rate news.

  9. This practice in the health insurance industry may have ... - AOL

    www.aol.com/finance/practice-health-insurance...

    Some people think using artificial intelligence for so-called "prior authorizations" in the healthcare industry has become too excessive, fuelling public anger at insurance companies. "That's ...