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  2. Spherical trigonometry - Wikipedia

    en.wikipedia.org/wiki/Spherical_trigonometry

    The cosine rule may be used to give the angles A, B, and C but, to avoid ambiguities, the half angle formulae are preferred. Case 2: two sides and an included angle given (SAS). The cosine rule gives a and then we are back to Case 1. Case 3: two sides and an opposite angle given (SSA). The sine rule gives C and then we have Case 7. There are ...

  3. Solid angle - Wikipedia

    en.wikipedia.org/wiki/Solid_angle

    Solid angles can also be measured in square degrees (1 sr = (180/ π) 2 square degrees), in square arc-minutes and square arc-seconds, or in fractions of the sphere (1 sr = ⁠ 1 / 4 π ⁠ fractional area), also known as spat (1 sp = 4 π sr). In spherical coordinates there is a formula for the differential,

  4. Solution of triangles - Wikipedia

    en.wikipedia.org/wiki/Solution_of_triangles

    For the spherical case, one can first compute the length of side from the point at α to the ship (i.e. the side opposite to β) via the ASA formula ⁡ = ⁡ ⁡ ⁡ (+) + ⁡ ⁡ (), and insert this into the AAS formula for the right subtriangle that contains the angle α and the sides b and d: ⁡ = ⁡ ⁡ = ⁡ + ⁡ ⁡. (The planar ...

  5. Cavalieri's principle - Wikipedia

    en.wikipedia.org/wiki/Cavalieri's_principle

    Meanwhile, infinitesimals were entities of the same dimension as the figure they make up; thus, a plane figure would be made out of "parallelograms" of infinitesimal width. Applying the formula for the sum of an arithmetic progression, Wallis computed the area of a triangle by partitioning it into infinitesimal parallelograms of width 1/∞.

  6. How Many Days a Week Should You Focus on Your Obliques ... - AOL

    www.aol.com/many-days-week-focus-obliques...

    A fitness expert explains why training your obliques two to three days a week is the ideal frequency to sculpt your waist.

  7. Self-avoiding walk - Wikipedia

    en.wikipedia.org/wiki/Self-avoiding_walk

    Is there a formula or algorithm that can calculate the number of self-avoiding walks in any given lattice? (more unsolved problems in mathematics) In mathematics , a self-avoiding walk ( SAW ) is a sequence of moves on a lattice (a lattice path ) that does not visit the same point more than once.

  8. These Strength Workouts Build Your Power Muscles for Better ...

    www.aol.com/lifestyle/strength-workouts-build...

    To that end, leg presses, lunges, and squat variations are staples, but exercises that train the obliques (side abs), rectus abdominis (front abs), and hip flexors are also critical, Booth explains.

  9. Square antiprism - Wikipedia

    en.wikipedia.org/wiki/Square_antiprism

    A crossed square antiprism is a star polyhedron, topologically identical to the square antiprism with the same vertex arrangement, but it can't be made uniform; the sides are isosceles triangles. Its vertex configuration is 3.3/2.3.4, with one triangle retrograde.