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  2. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    ≡ 10 km = 10 000 m: mile (geographical) (H) ≡ 6082 ft = 1 853.7936 m: mile (international) mi ≡ 80 chains ≡ 5280 ft ≡ 1760 yd: ≡ 1 609.344 m: mile (tactical or data) ≡ 6000 ft: ≡ 1 828.8 m: mile (telegraph) (H) mi ≡ 6087 ft = 1 855.3176 m: mile (US Survey) mi ≡ 5280 US Survey feet ≡ (5280 × 1200 ⁄ 3937) m ≈ 1 609.347 ...

  3. Latitude - Wikipedia

    en.wikipedia.org/wiki/Latitude

    With this value for R the meridian length of 1 degree of latitude on the sphere is 111.2 km (69.1 statute miles) (60.0 nautical miles). The length of one minute of latitude is 1.853 km (1.151 statute miles) (1.00 nautical miles), while the length of 1 second of latitude is 30.8 m or 101 feet (see nautical mile ).

  4. Rotation matrix - Wikipedia

    en.wikipedia.org/wiki/Rotation_matrix

    More specifically, they can be characterized as orthogonal matrices with determinant 1; that is, a square matrix R is a rotation matrix if and only if R T = R −1 and det R = 1. The set of all orthogonal matrices of size n with determinant +1 is a representation of a group known as the special orthogonal group SO( n ) , one example of which is ...

  5. Scioto County, Ohio - Wikipedia

    en.wikipedia.org/wiki/Scioto_County,_Ohio

    According to the U.S. Census Bureau, the county has an area of 616 square miles (1,600 km 2), of which 610 square miles (1,600 km 2) is land and 5.9 square miles (15 km 2) (1.0%) is water. [5] Many parts of Scioto County are heavily forested, especially in the western half of the county with Shawnee State Park .

  6. List of United States cities by population density - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States...

    The following is a list of unincorporated census-designated places with population densities of over 10,000 people per square mile as of the 2010 U.S. Census. [citation needed] The rank column indicates the rank the place would have if census-designated places were included in the above table of incorporated places.

  7. Geography of Rwanda - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Rwanda

    At 26,338 square kilometres (10,169 sq mi), Rwanda is the world's 149th-largest country. [2] It is comparable in size to Haiti or the state of Massachusetts in the United States. [ 3 ] [ 4 ] The entire country is at a high altitude: the lowest point is the Rusizi River at 950 metres (3,117 ft) above sea level.

  8. Dollar sign - Wikipedia

    en.wikipedia.org/wiki/Dollar_sign

    The dollar sign, also known as the peso sign, is a currency symbol consisting of a capital S crossed with one or two vertical strokes ($ or depending on typeface), used to indicate the unit of various currencies around the world, including most currencies denominated "dollar" or "peso".

  9. Indian rupee sign - Wikipedia

    en.wikipedia.org/wiki/Indian_rupee_sign

    Indian rupee symbol in graphic form. The new sign is a combination of the Devanagari letter र ("ra") and the Latin capital letter R without its vertical bar. The parallel lines at the top (with white space between them) makes an allusion to the tricolour Indian flag and also depict an equality sign that symbolizes the nation's desire to reduce economic disparity.