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  2. Ambigram - Wikipedia

    en.wikipedia.org/wiki/Ambigram

    The words "HIM", "TOY, "TOOTH" or "MAXIMUM", in all capitals, form natural mirror ambigrams when their letters are stacked vertically and reflected over a vertical axis. The uppercase word "OHIO" can flip a quarter to produce a 90° rotational ambigram when written in serif style (with large "feet" above and below the "I").

  3. Coordinate system - Wikipedia

    en.wikipedia.org/wiki/Coordinate_system

    A coordinate line with all other constant coordinates equal to zero is called a coordinate axis, an oriented line used for assigning coordinates. In a Cartesian coordinate system , all coordinates curves are lines, and, therefore, there are as many coordinate axes as coordinates.

  4. Cartesian coordinate system - Wikipedia

    en.wikipedia.org/wiki/Cartesian_coordinate_system

    A Cartesian coordinate system in two dimensions (also called a rectangular coordinate system or an orthogonal coordinate system [8]) is defined by an ordered pair of perpendicular lines (axes), a single unit of length for both axes, and an orientation for each axis. The point where the axes meet is taken as the origin for both, thus turning ...

  5. Quadrant (plane geometry) - Wikipedia

    en.wikipedia.org/wiki/Quadrant_(plane_geometry)

    The axes of a two-dimensional Cartesian system divide the plane into four infinite regions, called quadrants, each bounded by two half-axes. The axes themselves are, in general, not part of the respective quadrants.

  6. Rotational symmetry - Wikipedia

    en.wikipedia.org/wiki/Rotational_symmetry

    For discrete symmetry with multiple symmetry axes through the same point, there are the following possibilities: In addition to an n-fold axis, n perpendicular 2-fold axes: the dihedral groups D n of order 2n (n ≥ 2). This is the rotation group of a regular prism, or regular bipyramid.

  7. Washington State QB John Mateer to enter transfer portal ...

    www.aol.com/washington-state-qb-john-mateer...

    Mateer, who has two seasons of eligibility remaining, led the country in total touchdowns in his first season as the Cougars' starter, passing for 3,139 yards with 29 touchdowns to seven ...

  8. Rotation formalisms in three dimensions - Wikipedia

    en.wikipedia.org/wiki/Rotation_formalisms_in...

    This is Rodrigues' formula for the axis of a composite rotation defined in terms of the axes of the two component rotations. He derived this formula in 1840 (see page 408). [3] The three rotation axes A, B, and C form a spherical triangle and the dihedral angles between the planes formed by the sides of this triangle are defined by the rotation ...

  9. The best gifts to buy your grandkids — from babies to big ...

    www.aol.com/lifestyle/the-best-gifts-to-buy-your...

    The plastic bat is lightweight, so it’s easy for them to manage, and the set comes with two balls so you’ll have a spare if they hit a homerun into the neighbor’s yard.