- Cartesian coordinate system (Wikipedia)
In geometry, a Cartesian coordinate system (UK: /kɑːrˈtiːzjən/, US: /kɑːrˈtiːʒən/) in a plane is a coordinate system that specifies each point uniquely by a pair of real numbers called coordinates, which are the signed distances to the point from two fixed perpendicular oriented lines, called coordinate lines, coordinate axes or just axes (plural of axis) of the system. The point where they meet is called the origin and has (0, 0) as coordinates.
- Loch Ness (Wikipedia)
Loch Ness (/ˌlɒx ˈnɛs/; Scottish Gaelic: Loch Nis [l̪ˠɔx ˈniʃ]) is a large freshwater loch in the Scottish Highlands extending for approximately 37 kilometres (23 miles) along the length of the Great Glen southwest of Inverness. It takes its name from the River Ness, which flows from the northern end. Loch Ness is best known for claimed sightings of the cryptozoological Loch Ness Monster, also known affectionately as “Nessie” (Scottish Gaelic: Niseag). It is one of a series of interconnected, murky bodies of water in Scotland; its water visibility is exceptionally low due to the high peat content of the surrounding soil. The southern end connects to Loch Oich by the River Oich and a section of the Caledonian Canal. The northern end connects to Loch Dochfour via the River Ness, which then ultimately leads to the North Sea via the Moray Firth.
