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  2. BBC Bitesize - Wikipedia

    en.wikipedia.org/wiki/BBC_Bitesize

    GCSE Bitesize was launched in January 1998, covering seven subjects. For each subject, a one- or two-hour long TV programme would be broadcast overnight in the BBC Learning Zone block, and supporting material was available in books and on the BBC website. At the time, only around 9% of UK households had access to the internet at home.

  3. The 10 to 1 ratio was an estimate made in 1972; current estimates put the ratio at either 3 to 1 or 1.3 to 1. [301] The total length of capillaries in the human body is not 100,000 km. That figure comes from a 1929 book by August Krogh, who used an unrealistically large model person and an inaccurately high density of capillaries.

  4. Thales's theorem - Wikipedia

    en.wikipedia.org/wiki/Thales's_theorem

    In geometry, Thales's theorem states that if A, B, and C are distinct points on a circle where the line AC is a diameter, the angle ∠ ABC is a right angle. Thales's theorem is a special case of the inscribed angle theorem and is mentioned and proved as part of the 31st proposition in the third book of Euclid 's Elements . [ 1 ]

  5. List of theorems - Wikipedia

    en.wikipedia.org/wiki/List_of_theorems

    Hirzebruch signature theorem (topology, algebraic geometry) Jordan–Schönflies theorem (geometric topology) JSJ theorem (3-manifolds) Lickorish twist theorem (geometric topology) Lickorish–Wallace theorem (3-manifolds) Nielsen realization problem (geometric topology) Nielsen-Thurston classification (low-dimensional topology)

  6. Physical geography - Wikipedia

    en.wikipedia.org/wiki/Physical_geography

    Biogeography [6] [7] is the science which deals with geographic patterns of species distribution and the processes that result in these patterns. Biogeography emerged as a field of study as a result of the work of Alfred Russel Wallace , although the field prior to the late twentieth century had largely been viewed as historic in its outlook ...

  7. Set (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Set_(mathematics)

    A set of polygons in an Euler diagram This set equals the one depicted above since both have the very same elements.. In mathematics, a set is a collection of different [1] things; [2] [3] [4] these things are called elements or members of the set and are typically mathematical objects of any kind: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other ...

  8. Year 3 - Wikipedia

    en.wikipedia.org/wiki/Year_3

    It is the third full year of compulsory education, with children being admitted who are aged 7 before at least 1 September in any given academic year. It is also the first year of Key Stage 2 in which the National Curriculum is taught. [4] Year 3 is usually the fourth year of primary school or the first year group in a junior school.

  9. List of mathematical abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical...

    pdf – probability density function. pf – proof. PGL – projective general linear group. Pin – pin group. pmf – probability mass function. Pn – previous number. Pr – probability of an event. (See Probability theory. Also written as P or.) probit – probit function. PRNG – pseudorandom number generator.