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  2. Dioptrique - Wikipedia

    en.wikipedia.org/wiki/Dioptrique

    Page of Descartes' "La dioptrique" with the tennis ball example. Descartes uses a tennis ball to create a proof for the laws of reflection and refraction in his third model. This was important because he was using real-world objects (in this case, a tennis ball) to construct mathematical theory.

  3. Five themes of geography - Wikipedia

    en.wikipedia.org/wiki/Five_themes_of_geography

    A place is an area that is defined by everything in it. It differs from location in that a place is conditions and features, and location is a position in space. [4] Places have physical characteristics, such as landforms and plant and animal life, as well as human characteristics, such as economic activities and languages. [1]

  4. Rational root theorem - Wikipedia

    en.wikipedia.org/wiki/Rational_root_theorem

    If the rational root test finds no rational solutions, then the only way to express the solutions algebraically uses cube roots. But if the test finds a rational solution r, then factoring out (x – r) leaves a quadratic polynomial whose two roots, found with the quadratic formula, are the remaining two roots of the cubic, avoiding cube roots.

  5. Straightedge and compass construction - Wikipedia

    en.wikipedia.org/wiki/Straightedge_and_compass...

    Doubling the cube is the construction, using only a straightedge and compass, of the edge of a cube that has twice the volume of a cube with a given edge. This is impossible because the cube root of 2, though algebraic, cannot be computed from integers by addition, subtraction, multiplication, division, and taking square roots.

  6. Cube root law - Wikipedia

    en.wikipedia.org/wiki/Cube_root_law

    The cube root law is an observation in political science that the number of members of a unicameral legislature, or of the lower house of a bicameral legislature, is about the cube root of the population being represented. [1] The rule was devised by Estonian political scientist Rein Taagepera in his 1972 paper "The size of national assemblies ...

  7. Geography of Cuba - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Cuba

    Geography of Cuba Sierra Maestra Viñales Valley. Cuba is located 77 km (48 mi) west of Haiti across the Windward Passage, 22 km (14 mi) south of The Bahamas (Cay Lobos), 150 km (93 mi) south of the United States (Key West, Florida), 210 km (130 mi) east of Mexico, and 140 km (87 mi) north of Jamaica.

  8. Analytic geometry - Wikipedia

    en.wikipedia.org/wiki/Analytic_geometry

    The key difference between Fermat's and Descartes' treatments is a matter of viewpoint: Fermat always started with an algebraic equation and then described the geometric curve that satisfied it, whereas Descartes started with geometric curves and produced their equations as one of several properties of the curves. [12]

  9. Exponentiation - Wikipedia

    en.wikipedia.org/wiki/Exponentiation

    In mathematics, exponentiation is an operation involving two numbers: the base and the exponent or power.Exponentiation is written as b n, where b is the base and n is the power; this is pronounced as "b (raised) to the (power of) n ". [1]