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  2. Thales's theorem - Wikipedia

    en.wikipedia.org/wiki/Thales's_theorem

    As stated above, Thales's theorem is a special case of the inscribed angle theorem (the proof of which is quite similar to the first proof of Thales's theorem given above): Given three points A, B and C on a circle with center O, the angle ∠ AOC is twice as large as the angle ∠ ABC. A related result to Thales's theorem is the following:

  3. Intercept theorem - Wikipedia

    en.wikipedia.org/wiki/Intercept_theorem

    The intercept theorem, also known as Thales's theorem, basic proportionality theorem or side splitter theorem, is an important theorem in elementary geometry about the ratios of various line segments that are created if two rays with a common starting point are intercepted by a pair of parallels.

  4. Inscribed angle - Wikipedia

    en.wikipedia.org/wiki/Inscribed_angle

    A special case of the theorem is Thales's theorem, which states that the angle subtended by a diameter is always 90°, i.e., a right angle. As a consequence of the theorem, opposite angles of cyclic quadrilaterals sum to 180°; conversely, any quadrilateral for which this is true can be inscribed in a circle.

  5. Thales of Miletus - Wikipedia

    en.wikipedia.org/wiki/Thales_of_Miletus

    Thales's theorem: if AC is a diameter and B is a point on the diameter's circle, the angle ∠ ABC is a right angle. Pamphila says that, having learnt geometry from the Egyptians, Thales was the first to inscribe in a circle a right-angled triangle, whereupon he sacrificed an ox . [ 54 ]

  6. List of theorems - Wikipedia

    en.wikipedia.org/wiki/List_of_theorems

    Noether's theorem (Lie groups, calculus of variations, differential invariants, physics) Noether's second theorem (calculus of variations, physics) Noether's theorem on rationality for surfaces (algebraic surfaces) Non-squeezing theorem (symplectic geometry) Norton's theorem (electrical networks) Novikov's compact leaf theorem

  7. Regulators are investigating reports of property damage from ...

    www.aol.com/regulators-investigating-reports...

    The FAA says it has grounded the Starship vehicle pending a mishap investigation, and it’s working with SpaceX to assess reports of property damage in Turks and Caicos.

  8. Euclidean geometry - Wikipedia

    en.wikipedia.org/wiki/Euclidean_geometry

    Thales' theorem, named after Thales of Miletus states that if A, B, and C are points on a circle where the line AC is a diameter of the circle, then the angle ABC is a right angle. Cantor supposed that Thales proved his theorem by means of Euclid Book I, Prop. 32 after the manner of Euclid Book III, Prop. 31. [15] [16]

  9. International groups sound alarm after IDF detain director of ...

    www.aol.com/concerns-grow-israeli-forces-detain...

    "We call for his immediate release," Ghebreyesus said, while noting that Abu Safiya’s “whereabouts are unknown.” Hospitals and medical workers are considered protected under international ...