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  2. Missile approach warning system - Wikipedia

    en.wikipedia.org/wiki/Missile_approach_warning...

    Guided surface-to-air missile (SAM) systems were developed during World War II and began to make their presence felt in the 1950s. In response, electronic countermeasures (ECM) and flying tactics were developed to overcome them. They proved to be quite successful provided that a reliable and timely threat warning was given.

  3. Basic fighter maneuvers - Wikipedia

    en.wikipedia.org/wiki/Basic_fighter_maneuvers

    Basic fighter maneuvers (BFM) are actions that a fighter aircraft makes during air combat maneuvering, historically known as dogfighting.The development of BFM began with the first fighter aircraft, during World War I, then continued with each following war, adapting to the changing weapons and technologies.

  4. Acute and obtuse triangles - Wikipedia

    en.wikipedia.org/wiki/Acute_and_obtuse_triangles

    An acute triangle (or acute-angled triangle) is a triangle with three acute angles (less than 90°). An obtuse triangle (or obtuse-angled triangle) is a triangle with one obtuse angle (greater than 90°) and two acute angles. Since a triangle's angles must sum to 180° in Euclidean geometry, no Euclidean triangle can have more than one obtuse ...

  5. Perceived visual angle - Wikipedia

    en.wikipedia.org/wiki/Perceived_visual_angle

    The two orange circles are exactly the same size; however, the one on the left seems smaller. The two central circles are the same linear size S and the same viewing distance D, so they subtend the same visual angle θ and form equal-sized retinal images. But the lower one "looks larger" than the upper one.

  6. Central angle - Wikipedia

    en.wikipedia.org/wiki/Central_angle

    Angle AOB is a central angle. A central angle is an angle whose apex (vertex) is the center O of a circle and whose legs (sides) are radii intersecting the circle in two distinct points A and B. Central angles are subtended by an arc between those two points, and the arc length is the central angle of a circle of radius one (measured in radians). [1]

  7. “Keeping It Real”: 17 Celebrity Photos That Reveal Lesser ...

    www.aol.com/17-raw-real-celebrity-photos...

    In addition to making humorous posts about daily mom issues, including how difficult it is to get a family photo where all children look at the camera, the 39-year-old also keeps it real regarding ...

  8. Lessons from the corporate governance 'mess' at OpenAI - AOL

    www.aol.com/finance/lessons-corporate-governance...

    A five-day boardroom drama at OpenAI ended Wednesday with the return of CEO Sam Altman and an overhaul of the board. The lesson that will linger is the importance of governance to the stability of ...

  9. Incircle and excircles - Wikipedia

    en.wikipedia.org/wiki/Incircle_and_excircles

    In geometry, the incircle or inscribed circle of a triangle is the largest circle that can be contained in the triangle; it touches (is tangent to) the three sides. The center of the incircle is a triangle center called the triangle's incenter.