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  2. History Alive! textbooks - Wikipedia

    en.wikipedia.org/wiki/History_Alive!_textbooks

    In 2005, Daniel Pipes, described as an Islamophobe or anti-Arab propagandist, and creator of Campus Watch, published a comment on his site about Islamic indoctrination in the History Alive! textbook, which was being trialed in the district, as did Cinnamon Stilwell in the San Francisco Chronicle; Stilwell is a conservative commentator who has ...

  3. This file is licensed under the United Kingdom Open Government Licence v3.0.: You are free to: copy, publish, distribute and transmit the Information; adapt the Information; ...

  4. History Alive! - Wikipedia

    en.wikipedia.org/wiki/History_Alive!

    History Alive was a live-action educational series originally produced in early 1970s by Walt Disney Educational. The series dealt with American history. The main Supervisor of this series was Turnley Walker. Later school textbooks were made with the name history alive. These text books are used to teach world history all around the U.S. [1]

  5. List of formulas in elementary geometry - Wikipedia

    en.wikipedia.org/wiki/List_of_formulas_in...

    Area#Area formulas – Size of a two-dimensional surface; Perimeter#Formulas – Path that surrounds an area; List of second moments of area; List of surface-area-to-volume ratios – Surface area per unit volume; List of surface area formulas – Measure of a two-dimensional surface; List of trigonometric identities

  6. Area of a circle - Wikipedia

    en.wikipedia.org/wiki/Area_of_a_circle

    The area of a regular polygon is half its perimeter multiplied by the distance from its center to its sides, and because the sequence tends to a circle, the corresponding formula–that the area is half the circumference times the radius–namely, A = ⁠ 1 / 2 ⁠ × 2πr × r, holds for a circle.

  7. Earth's circumference - Wikipedia

    en.wikipedia.org/wiki/Earth's_circumference

    Earth's circumference is the distance around Earth. Measured around the equator, it is 40,075.017 km (24,901.461 mi). Measured passing through the poles, the circumference is 40,007.863 km (24,859.734 mi). [1] Treating the Earth as a sphere, its circumference would be its single most important measurement. [2]

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  9. Circle - Wikipedia

    en.wikipedia.org/wiki/Circle

    A circle circumference and radius are proportional. The area enclosed and the square of its radius are proportional. The constants of proportionality are 2 π and π respectively. The circle that is centred at the origin with radius 1 is called the unit circle. Thought of as a great circle of the unit sphere, it becomes the Riemannian circle.