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  2. National Council of Educational Research and Training

    en.wikipedia.org/wiki/National_Council_of...

    Around 19 school boards from 14 states have adopted or adapted the books. [11] Those who wish to adopt the textbooks are required to send a request to NCERT, upon which soft copies of the books are received. The material is press-ready and may be printed by paying a 5% royalty, and by acknowledging NCERT. [11]

  3. The Circle (Elfgren and Strandberg novel) - Wikipedia

    en.wikipedia.org/wiki/The_Circle_(Elfgren_and...

    The Circle (Swedish title Cirkeln) is a Swedish young adult fantasy novel written by Mats Strandberg and Sara Bergmark Elfgren.It is the first part of the Engelsfors trilogy. . The novel takes place in a fictional rural town in Bergslagen in central Sweden and follows a group of teenage girls with little in common who discover that they are witches chosen to save the world from an otherworldly e

  4. Math circle - Wikipedia

    en.wikipedia.org/wiki/Math_circle

    A math circle is an extracurricular activity intended to enrich students' understanding of mathematics. The concept of math circle came into being in the erstwhile USSR and Bulgaria , around 1907, with the very successful mission to "discover future mathematicians and scientists and to train them from the earliest possible age".

  5. Circles (essay) - Wikipedia

    en.wikipedia.org/wiki/Circles_(essay)

    Circles" is an essay by Ralph Waldo Emerson, first published in 1841. The essay consists of a philosophical view of the vast array of circles one may find throughout nature . In the opening line of the essay Emerson states "The eye is the first circle; the horizon which it forms is the second; and throughout nature this primary figure is ...

  6. Congruence (geometry) - Wikipedia

    en.wikipedia.org/wiki/Congruence_(geometry)

    Two circles are congruent if they have the same diameter. In this sense, the sentence "two plane figures are congruent" implies that their corresponding characteristics are congruent (or equal ) including not just their corresponding sides and angles, but also their corresponding diagonals, perimeters, and areas.

  7. Dividing a circle into areas - Wikipedia

    en.wikipedia.org/wiki/Dividing_a_circle_into_areas

    The number of points (n), chords (c) and regions (r G) for first 6 terms of Moser's circle problem. In geometry, the problem of dividing a circle into areas by means of an inscribed polygon with n sides in such a way as to maximise the number of areas created by the edges and diagonals, sometimes called Moser's circle problem (named after Leo Moser), has a solution by an inductive method.

  8. The Tenth Circle - Wikipedia

    en.wikipedia.org/wiki/The_Tenth_Circle

    The Tenth Circle (2006) is the thirteenth novel by the American author Jodi Picoult. The novel deals with date rape , and father/daughter relationships. The novel heavily references Dante Alighieri's Inferno .

  9. Tangent lines to circles - Wikipedia

    en.wikipedia.org/wiki/Tangent_lines_to_circles

    An inversion in their tangent point with respect to a circle of appropriate radius transforms the two touching given circles into two parallel lines, and the third given circle into another circle. Thus, the solutions may be found by sliding a circle of constant radius between two parallel lines until it contacts the transformed third circle.