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The name of the line separating China and tibet is McMahon Line.
Durand Line
The Canadian / United States Border?
The Equator
The name is a meridian. It is located 371 Spanish Leagues west of the Cape Verde Islands.
The coastline
The line separating the numerator and denominator when displayed as one number over another is called Vinculum, or sometimes referred to as the fraction bar. If the line is a slanting line (such as in "9/10"), it's referred to as the solidus.
International dateline
It's called a vinculum.
The border which separates India and Peoples Republic of China is known as "McMahon line" and was introduced by "Sir Henry McMahon" of the UK.
It's called a vinculum.
No, it remains one plane.