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  2. Angle - Wikipedia

    en.wikipedia.org/wiki/Angle

    A green angle formed by two red rays on the Cartesian coordinate system. In Euclidean geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. [1] Angles formed by two rays are also known as plane angles as they lie in the plane that contains the rays

  3. Internal and external angles - Wikipedia

    en.wikipedia.org/wiki/Internal_and_external_angles

    The interior angle concept can be extended in a consistent way to crossed polygons such as star polygons by using the concept of directed angles.In general, the interior angle sum in degrees of any closed polygon, including crossed (self-intersecting) ones, is then given by 180(n–2k)°, where n is the number of vertices, and the strictly positive integer k is the number of total (360 ...

  4. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    A formula for computing the trigonometric identities for the one-third angle exists, but it requires finding the zeroes of the cubic equation 4x 3 − 3x + d = 0, where is the value of the cosine function at the one-third angle and d is the known value of the cosine function at the full angle.

  5. Corresponding sides and corresponding angles - Wikipedia

    en.wikipedia.org/wiki/Corresponding_sides_and...

    The corresponding angles as well as the corresponding sides are defined as appearing in the same sequence, so for example if in a polygon with the side sequence abcde and another with the corresponding side sequence vwxyz we have vertex angle a appearing between sides a and b then its corresponding vertex angle v must appear between sides v and w.

  6. List of map projections - Wikipedia

    en.wikipedia.org/wiki/List_of_map_projections

    Preserves angles locally, implying that local shapes are not distorted and that local scale is constant in all directions from any chosen point. Equal-area Area measure is conserved everywhere. Compromise Neither conformal nor equal-area, but a balance intended to reduce overall distortion. Equidistant All distances from one (or two) points are ...

  7. Conic section - Wikipedia

    en.wikipedia.org/wiki/Conic_section

    Conic sections visualized with torch light This diagram clarifies the different angles of the cutting planes that result in the different properties of the three types of conic section. A conic section, conic or a quadratic curve is a curve obtained from a cone's surface intersecting a plane.

  8. Who was Matthew Livelsberger, the US Army veteran named as a ...

    www.aol.com/news/matthew-livelsberger-us-army...

    Video posted on social media showed different angles of the explosion, which appeared to include fireworks. Firework mortars and camp fuel canisters were found inside the truck, sources told Denver 7.

  9. Triangle - Wikipedia

    en.wikipedia.org/wiki/Triangle

    An exterior angle of a triangle is an angle that is a linear pair (and hence supplementary) to an interior angle. The measure of an exterior angle of a triangle is equal to the sum of the measures of the two interior angles that are not adjacent to it; this is the exterior angle theorem. [34]

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