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Decatur, Alabama. / 34.57306°N 86.99028°W / 34.57306; -86.99028. Decatur ( / dɪˈkeɪtər / [ 7]) is the largest city and county seat of Morgan County (with a portion also in Limestone County) in the U.S. state of Alabama. [ 8] Nicknamed "The River City," it is located in northern Alabama on the banks of Wheeler Lake along the ...
The great-circle distance, orthodromic distance, or spherical distance is the distance between two points on a sphere, measured along the great-circle arc between them. This arc is the shortest path between the two points on the surface of the sphere. (By comparison, the shortest path passing through the sphere's interior is the chord between ...
Quad site. The Quad site is a series of Paleoindian sites and localities in Limestone County near Decatur, Alabama. It was first reported by Frank Soday in 1954, [1] and later findings were also documented by James Cambron, [2] [3] [4] David Hulse and Joe Wright [5] and Cambron and Hulse. [6] [7] [8] The Quad Locale can seldom be viewed at ...
The distance (or perpendicular distance) from a point to a line is the shortest distance from a fixed point to any point on a fixed infinite line in Euclidean geometry. It is the length of the line segment which joins the point to the line and is perpendicular to the line. The formula for calculating it can be derived and expressed in several ways.
State Route 24 ( SR 24) is a 71-mile-long (114 km) state highway in the northwestern and north-central part of the state. The western terminus of the route is near Red Bay at the Mississippi state line, where it continues as Mississippi Highway 76 (MS 76). The eastern terminus of the route is near the junction with SR 67 at Decatur, where it ...
I-39 was designed to replace U.S. Route 51 (US 51), which, in the early 1980s, was one of the busiest two-lane highways in the United States. [citation needed] I-39 was built in the 1980s and 1990s. In Illinois, the route has a total length of 140.82 miles (226.63 km). [3] In Wisconsin, I-39 has a distance of 182 miles (293 km).
State Route 20 ( SR 20) is a 73.978-mile-long (119.056 km) state highway in the northern part of the U.S. state of Alabama. It travels from the Tennessee state line, where it continues as Tennessee State Route 69, northwest of Florence, east to Interstate 65 (I-65), east of Decatur. It crosses the Tennessee River at Florence (with US 43, US 72 ...
Alternate U.S. Route 72 ( US 72 Alt.) exists in Alabama on the south side of the Tennessee River between Muscle Shoals and Decatur, while US 72 follows on the north side of the river between Florence and Athens. US 72 Alt. crosses the Tennessee River at Decatur, along with US 31, and follows the entire route of Interstate 565 (I-565).