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  2. Equality (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Equality_(mathematics)

    In mathematics, equality is a relationship between two quantities or expressions, stating that they have the same value, or represent the same mathematical object. [1] [2] Equality between A and B is written A = B, and pronounced "A equals B". In this equality, A and B are distinguished by calling them left-hand side (LHS), and right-hand side ...

  3. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    3. Between two groups, may mean that the first one is a proper subgroup of the second one. > (greater-than sign) 1. Strict inequality between two numbers; means and is read as "greater than". 2. Commonly used for denoting any strict order. 3. Between two groups, may mean that the second one is a proper subgroup of the first one. ≤ 1.

  4. Parallel (geometry) - Wikipedia

    en.wikipedia.org/wiki/Parallel_(geometry)

    the distance between the two lines can be found by locating two points (one on each line) that lie on a common perpendicular to the parallel lines and calculating the distance between them. Since the lines have slope m, a common perpendicular would have slope −1/m and we can take the line with equation y = −x/m as a common perpendicular ...

  5. Equation - Wikipedia

    en.wikipedia.org/wiki/Equation

    A line is expressed as the intersection of two planes, that is as the solution set of a single linear equation with values in or as the solution set of two linear equations with values in . A conic section is the intersection of a cone with equation x 2 + y 2 = z 2 {\displaystyle x^{2}+y^{2}=z^{2}} and a plane.

  6. Parallel postulate - Wikipedia

    en.wikipedia.org/wiki/Parallel_postulate

    Given a line a and two distinct intersecting lines m and n, each different from a, there exists a line g which intersects a and m, but not n. The splitting of the parallel postulate into the conjunction of these incidence-geometric axioms is possible only in the presence of absolute geometry .

  7. Law (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Law_(mathematics)

    Pythagorean theorem: It states that the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other two sides. The theorem can be written as an equation relating the lengths of the sides a , b and the hypotenuse c , sometimes called the Pythagorean equation: [ 6 ]

  8. Line (geometry) - Wikipedia

    en.wikipedia.org/wiki/Line_(geometry)

    secant lines, which intersect the conic at two points and pass through its interior; [5] exterior lines, which do not meet the conic at any point of the Euclidean plane; or; a directrix, whose distance from a point helps to establish whether the point is on the conic. a coordinate line, a linear coordinate dimension

  9. Playfair's axiom - Wikipedia

    en.wikipedia.org/wiki/Playfair's_axiom

    Two straight lines which intersect one another cannot be both parallel to the same straight line. Playfair acknowledged Ludlam and others for simplifying the Euclidean assertion. In later developments the point of intersection of the two lines came first, and the denial of two parallels became expressed as a unique parallel through the given point.