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  2. Semicircle - Wikipedia

    en.wikipedia.org/wiki/Semicircle

    PR is the diameter of a circle centered on O; its radius AO is the arithmetic mean of a and b. Using the geometric mean theorem, triangle PGR's altitude GQ is the geometric mean. For any ratio a:b, AO ≥ GQ. A semicircle can be used to construct the arithmetic and geometric means of two lengths using straight-edge and compass.

  3. Semiperimeter - Wikipedia

    en.wikipedia.org/wiki/Semiperimeter

    In geometry, the semiperimeter of a polygon is half its perimeter. Although it has such a simple derivation from the perimeter, the semiperimeter appears frequently enough in formulas for triangles and other figures that it is given a separate name. When the semiperimeter occurs as part of a formula, it is typically denoted by the letter s.

  4. Graphometer - Wikipedia

    en.wikipedia.org/wiki/Graphometer

    In effect the device is a half-circumferentor. For convenience, sometimes another half-circle from 180 to 360 degrees may be graduated in another line on the limb. [1] The form was introduced in Philippe Danfrie's Déclaration de l’usage du graphomètre (Paris, 1597) [2] [3] and the term graphometer was popular with French geodesists.

  5. Semi-major and semi-minor axes - Wikipedia

    en.wikipedia.org/wiki/Semi-major_and_semi-minor_axes

    The semi-major axis (major semiaxis) is the longest semidiameter or one half of the major axis, and thus runs from the centre, through a focus, and to the perimeter. The semi-minor axis (minor semiaxis) of an ellipse or hyperbola is a line segment that is at right angles with the semi-major axis and has one end at the center of the conic section.

  6. List of second moments of area - Wikipedia

    en.wikipedia.org/wiki/List_of_second_moments_of_area

    Regular polygons; Description Figure Second moment of area Comment A filled regular (equiliteral) triangle with a side length of a = = [6] The result is valid for both a horizontal and a vertical axis through the centroid, and therefore is also valid for an axis with arbitrary direction that passes through the origin.

  7. Moral Injury: Healing - The Huffington Post

    projects.huffingtonpost.com/moral-injury/healing?...

    Some troops leave the battlefield injured. Others return from war with mental wounds. Yet many of the 2 million Iraq and Afghanistan veterans suffer from a condition the Defense Department refuses to acknowledge: Moral injury.

  8. List of centroids - Wikipedia

    en.wikipedia.org/wiki/List_of_centroids

    Solid semi-ellipsoid of revolution around z-axis: a = the radius of the base circle h = the height of the semi-ellipsoid from the base cicle's center to the edge ...

  9. New Evidence Ties World Bank to Human Rights Abuses in Ethiopia

    projects.huffingtonpost.com/worldbank-evicted...

    The bank said its investments in Ethiopia had helped slash child mortality in half and increase primary school enrollment by 13 percent in less than a decade. The Ethiopian government has said its resettlement campaign in Gambella relocated 37,883 families before it concluded in mid-2013.