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  2. Spherical trigonometry - Wikipedia

    en.wikipedia.org/wiki/Spherical_trigonometry

    The octant of a sphere is a spherical triangle with three right angles.. Spherical trigonometry is the branch of spherical geometry that deals with the metrical relationships between the sides and angles of spherical triangles, traditionally expressed using trigonometric functions.

  3. Instant centre of rotation - Wikipedia

    en.wikipedia.org/wiki/Instant_centre_of_rotation

    Sketch 1: Instantaneous center P of a moving plane. The instant center of rotation (also known as instantaneous velocity center, [1] instantaneous center, or pole of planar displacement) of a body undergoing planar movement is a point that has zero velocity at a particular instant of time.

  4. Gelora Bung Karno Stadium - Wikipedia

    en.wikipedia.org/wiki/Gelora_Bung_Karno_Stadium

    Gelora Bung Karno Main Stadium (Indonesian: Stadion Utama Gelora Bung Karno; literally "Bung Karno Sports Arena Main Stadium"), formerly Senayan Main Stadium and Gelora Senayan Main Stadium, is a multi-purpose stadium located at the center of the Gelora Bung Karno Sports Complex in Central Jakarta, Indonesia.

  5. Jakarta International Stadium - Wikipedia

    en.wikipedia.org/wiki/Jakarta_International_Stadium

    Jakarta International Stadium (Indonesian: Stadion Internasional Jakarta) is a retractable roof football stadium in Tanjung Priok, Jakarta, Indonesia.It is the home ground of Persija Jakarta after moving from their previous stadium, Gelora Bung Karno Stadium, and the occasional home of the Indonesia national football team, after an agreement between PSSI and PT JAKPRO to use the facility. [1]

  6. Exterior angle theorem - Wikipedia

    en.wikipedia.org/wiki/Exterior_angle_theorem

    The exterior angle theorem is Proposition 1.16 in Euclid's Elements, which states that the measure of an exterior angle of a triangle is greater than either of the measures of the remote interior angles.