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Symbol. The parallel symbol is . For example, indicates that line AB is parallel to line CD. In the Unicode character set, the "parallel" and "not parallel" signs have codepoints U+2225 (∥) and U+2226 (∦), respectively. In addition, U+22D5 (⋕) represents the relation "equal and parallel to".
The symbol for parallel lines is \parallel, ∥, so we can say that \overleftrightarrow {AB}\parallel\overleftrightarrow {CD} AB ∥ C D in that figure. According to the axioms of Euclidean geometry, a line is not parallel to itself, since it intersects itself infinitely often.
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A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula.
Two lines are parallel if they do not meet, no matter how far they are extended. The symbol for parallel is \(||\). In Figure \(\PageIndex{1}\), \(\stackrel{\leftrightarrow}{A B}\) \(||\) \(\stackrel{\leftrightarrow}{C D}\). The arrow marks are used to indicate the lines are parallel.
In geometry and mathematics, the ∥ symbol, known as the "Parallel To" symbol, is an essential notation. It indicates that two lines, planes, or other geometric entities run in the same direction without ever meeting, regardless of how far they are extended.
In geometry, the parallel symbol is used to denote two lines that are parallel to each other. Typically the parallel symbol is used in an expression like this: AB ∥ C D.
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