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Attempts at providing a rigorous, abstract definition usually face philosophical [[paradox]]es, such as [[Euclid]]'s contention that lines are objects with "breadthless length." In other words, he asserted that a line in infinitely long, but has no width. Lines can also be considered as points strung together, or as curves with infinite [[radius]] of [[curvature]], yet both these definitions have philosophical flaws as well.
Attempts at providing a rigorous, abstract definition usually face philosophical [[paradox]]es, such as [[Euclid]]'s contention that lines are objects with "breadthless length." In other words, he asserted that a line in infinitely long, but has no width. Lines can also be considered as points strung together, or as curves with infinite [[radius]] of [[curvature]], yet both these definitions have philosophical flaws as well.
Airports
See also: List of airports in Texas
Texas has 730 airports, second most of any state in the nation. Largest in Texas by size and passengers served, Dallas/Fort Worth International Airport (DFW) is the second largest by area in the United States, and fourth in the world with 18,076 acres (73.15 km2).[298] In traffic, DFW is the busiest in the state, the fourth busiest in the United States,[299] and sixth worldwide.[300] American Airlines Group's American / American Eagle, the world's largest airline in total passengers-miles transported and passenger fleet size,[301] uses DFW as its largest and main hub. Southwest Airlines, headquartered in Dallas, has its operations at Dallas Love Field.[302] It ranks as the largest airline in the United States by number of passengers carried domestically per year and the largest airline in the world by number of passengers carried.[303]
Texas's second-largest air facility is Houston's George Bush Intercontinental Airport (IAH). It served as the largest hub for the former Continental Airlines, which was based in Houston; it serves as the largest hub for United Airlines, the world's third-largest airline, by passenger-miles flown.[304][305] IAH offers service to the most Mexican destinations of any U.S. airport.[306][307] The next five largest airports in the state all serve over 3 million passengers annually; they include Austin-Bergstrom International Airport, William P. Hobby Airport, San Antonio International Airport, Dallas Love Field and El Paso International Airport. The smallest airport in the state to be designated an international airport is Del Rio International Airport.
[[Category:Geometry]]
[[Category:Geometry]]