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  2. List of formulas in elementary geometry - Wikipedia

    en.wikipedia.org/wiki/List_of_formulas_in...

    Area#Area formulas – Size of a two-dimensional surface; Perimeter#Formulas – Path that surrounds an area; List of second moments of area; List of surface-area-to-volume ratios – Surface area per unit volume; List of surface area formulas – Measure of a two-dimensional surface; List of trigonometric identities

  3. Mnemonics in trigonometry - Wikipedia

    en.wikipedia.org/wiki/Mnemonics_in_trigonometry

    Signs of trigonometric functions in each quadrant. All Students Take Calculus is a mnemonic for the sign of each trigonometric functions in each quadrant of the plane. The letters ASTC signify which of the trigonometric functions are positive, starting in the top right 1st quadrant and moving counterclockwise through quadrants 2 to 4.

  4. Rhombic triacontahedron - Wikipedia

    en.wikipedia.org/wiki/Rhombic_triacontahedron

    Let φ be the golden ratio.The 12 points given by (0, ±1, ±φ) and cyclic permutations of these coordinates are the vertices of a regular icosahedron.Its dual regular dodecahedron, whose edges intersect those of the icosahedron at right angles, has as vertices the 8 points (±1, ±1, ±1) together with the 12 points (0, ±φ, ± ⁠ 1 / φ ⁠) and cyclic permutations of these coordinates.

  5. Template:Table of angles - Wikipedia

    en.wikipedia.org/wiki/Template:Table_of_angles

    1 / 16 ⁠ turn ⁠ π / 8 ⁠ or ⁠ 𝜏 / 16 ⁠ rad 22.5° 25 g ⁠ 1 / 12 ⁠ turn ⁠ π / 6 ⁠ or ⁠ 𝜏 / 12 ⁠ rad 30° ⁠33 + 1 / 3 ⁠ g ⁠ 1 / 10 ⁠ turn ⁠ π / 5 ⁠ or ⁠ 𝜏 / 10 ⁠ rad 36° 40 g ⁠ 1 / 8 ⁠ turn ⁠ π / 4 ⁠ or ⁠ 𝜏 / 8 ⁠ rad 45° 50 g ⁠ 1 / 2 π or 𝜏 ⁠ turn 1 rad approx. 57.3 ...

  6. Outline of trigonometry - Wikipedia

    en.wikipedia.org/wiki/Outline_of_trigonometry

    Geometry is used extensively in trigonometry. Angle – the angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed by two rays lie in a plane, but this plane does not have to be a Euclidean plane.

  7. Miller twist rule - Wikipedia

    en.wikipedia.org/wiki/Miller_twist_rule

    When computing using this formula, Miller suggests several safe values that can be used for some of the more difficult to determine variables. For example, he states that a mach number of M {\displaystyle M} = 2.5 (roughly 2800 ft/sec, assuming standard conditions at sea level where 1 Mach is roughly 1116 ft/sec) is a safe value to use for ...

  8. Geometry template - Wikipedia

    en.wikipedia.org/wiki/Geometry_template

    Stencil for the curves of y=x 2, y=tan(x), y=sin(x), and y= ⁠ 1 / 2 ⁠ sin(x). A geometry template is a piece of clear plastic with cut-out shapes for use in mathematics and other subjects in primary school through secondary school. It also has various measurements on its sides to be used like a ruler. In Australia, popular brands include ...

  9. Divine Proportions: Rational Trigonometry to Universal Geometry

    en.wikipedia.org/wiki/Divine_Proportions:...

    [2] [1] It also allows analogous concepts to be extended directly from the rational numbers to other number systems such as finite fields using the same formulas for quadrance and spread. [1] Additionally, this method avoids the ambiguity of the two supplementary angles formed by a pair of lines, as both angles have the same spread.

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