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2. No-three-in-line problem - Wikipedia

   en.wikipedia.org/wiki/No-three-in-line_problem

   A set of 20 points in a 10 × 10 grid, with no three points in a line. The no-three-in-line problem in discrete geometry asks how many points can be placed in the grid so that no three points lie on the same line.

3. Carmen Sandiego Adventures in Math - Wikipedia

   en.wikipedia.org/wiki/Carmen_Sandiego_Adventures...

   The games were developed by Gamelion Studios, [5] and published by Houghton Mifflin Harcourt. [6] They could take up to 6 players, and required 600 Wii points. [7] Maths topics included in the games include: Symmetry, Identifying angles, Graphing coordinates on a grid, Logic puzzles, Working with fractions, Solving equations, and Tangrams.

4. Dots and boxes - Wikipedia

   en.wikipedia.org/wiki/Dots_and_Boxes

   A game of dots and boxes. Dots and boxes is a pencil-and-paper game for two players (sometimes more). It was first published in the 19th century by French mathematician Édouard Lucas, who called it la pipopipette. [1] It has gone by many other names, [2] including dots and dashes, game of dots, [3] dot to dot grid, [4] boxes, [5] and pigs in a ...

5. Coordinate system - Wikipedia

   en.wikipedia.org/wiki/Coordinate_system

   In the cylindrical coordinate system, a z-coordinate with the same meaning as in Cartesian coordinates is added to the r and θ polar coordinates giving a triple (r, θ, z). [8] Spherical coordinates take this a step further by converting the pair of cylindrical coordinates ( r , z ) to polar coordinates ( ρ , φ ) giving a triple ( ρ , θ ...

6. Rotation of axes in two dimensions - Wikipedia

   en.wikipedia.org/wiki/Rotation_of_axes_in_two...

   A point P has coordinates (x, y) with respect to the original system and coordinates (x′, y′) with respect to the new system. [1] In the new coordinate system, the point P will appear to have been rotated in the opposite direction, that is, clockwise through the angle . A rotation of axes in more than two dimensions is defined similarly.

7. List of common coordinate transformations - Wikipedia

   en.wikipedia.org/wiki/List_of_common_coordinate...

   Let (x, y, z) be the standard Cartesian coordinates, and (ρ, θ, φ) the spherical coordinates, with θ the angle measured away from the +Z axis (as , see conventions in spherical coordinates). As φ has a range of 360° the same considerations as in polar (2 dimensional) coordinates apply whenever an arctangent of it is taken. θ has a range ...

8. Alphanumeric grid - Wikipedia

   en.wikipedia.org/wiki/Alphanumeric_grid

   An alphanumeric grid (also known as atlas grid [1]) is a simple coordinate system on a grid in which each cell is identified by a combination of a letter and a number. [ 2 ] An advantage over numeric coordinates such as easting and northing , which use two numbers instead of a number and a letter to refer to a grid cell, is that there can be no ...

9. Hex map - Wikipedia

   en.wikipedia.org/wiki/Hex_map

   The Battle for Wesnoth, a hex grid based computer game. A hex map, hex board, or hex grid is a game board design commonly used in simulation games of all scales, including wargames, role-playing games, and strategy games in both board games and video games. A hex map is subdivided into a hexagonal tiling, small regular hexagons of identical size.