Faster access than browser!
47 relations: Affine transformation, Angle, Antiparallelogram, Area, Automedian triangle, Centroid, Compass-and-straightedge construction, Concave polygon, Concurrent lines, Congruence (geometry), Conjugate diameters, Converse (logic), Convex polygon, Cross product, Cut-the-Knot, Diagonal, Ellipse, Euclidean geometry, Face (geometry), Fundamental parallelogram, Heron's formula, If and only if, List of self-intersecting polygons, Median (geometry), Midpoint, Parallel (geometry), Parallel postulate, Parallelepiped, Parallelogram law, Point reflection, Polygon, Quadrilateral, Rectangle, Reflection symmetry, Rhomboid, Rhombus, Right angle, Right triangle, Rotational symmetry, Simple polygon, Square, Square number, Tangent, The College Mathematics Journal, Trapezoid, Triangle, Viviani's theorem.
Affine transformation
In geometry, an affine transformation, affine mapBerger, Marcel (1987), p. 38.
New!!: Parallelogram and Affine transformation · See more »
Angle
In plane geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
New!!: Parallelogram and Angle · See more »
Antiparallelogram
In geometry, an antiparallelogram is a quadrilateral having, like a parallelogram, two opposite pairs of equal-length sides, but in which the sides of one pair cross each other.
New!!: Parallelogram and Antiparallelogram · See more »
Area
Area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane.
New!!: Parallelogram and Area · See more »
Automedian triangle
In plane geometry, an automedian triangle is a triangle in which the lengths of the three medians (the line segments connecting each vertex to the midpoint of the opposite side) are proportional to the lengths of the three sides, in a different order.
New!!: Parallelogram and Automedian triangle · See more »
Centroid
In mathematics and physics, the centroid or geometric center of a plane figure is the arithmetic mean position of all the points in the shape.
New!!: Parallelogram and Centroid · See more »
Compass-and-straightedge construction
Compass-and-straightedge construction, also known as ruler-and-compass construction or classical construction, is the construction of lengths, angles, and other geometric figures using only an idealized ruler and compass.
New!!: Parallelogram and Compass-and-straightedge construction · See more »
Concave polygon
A simple polygon that is not convex is called concave, non-convex or reentrant.
New!!: Parallelogram and Concave polygon · See more »
Concurrent lines
In geometry, three or more lines in a plane or higher-dimensional space are said to be concurrent if they intersect at a single point.
New!!: Parallelogram and Concurrent lines · See more »
Congruence (geometry)
In geometry, two figures or objects are congruent if they have the same shape and size, or if one has the same shape and size as the mirror image of the other.
New!!: Parallelogram and Congruence (geometry) · See more »
Conjugate diameters
In geometry, two diameters of a conic section are said to be conjugate if each chord parallel to one diameter is bisected by the other diameter.
New!!: Parallelogram and Conjugate diameters · See more »
Converse (logic)
In logic, the converse of a categorical or implicational statement is the result of reversing its two parts.
New!!: Parallelogram and Converse (logic) · See more »
Convex polygon
A convex polygon is a simple polygon (not self-intersecting) in which no line segment between two points on the boundary ever goes outside the polygon.
New!!: Parallelogram and Convex polygon · See more »
Cross product
In mathematics and vector algebra, the cross product or vector product (occasionally directed area product to emphasize the geometric significance) is a binary operation on two vectors in three-dimensional space \left(\mathbb^3\right) and is denoted by the symbol \times.
New!!: Parallelogram and Cross product · See more »
Cut-the-Knot
Cut-the-knot is a free, advertisement-funded educational website maintained by Alexander Bogomolny and devoted to popular exposition of many topics in mathematics.
New!!: Parallelogram and Cut-the-Knot · See more »
Diagonal
In geometry, a diagonal is a line segment joining two vertices of a polygon or polyhedron, when those vertices are not on the same edge.
New!!: Parallelogram and Diagonal · See more »
Ellipse
In mathematics, an ellipse is a curve in a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the curve.
New!!: Parallelogram and Ellipse · See more »
Euclidean geometry
Euclidean geometry is a mathematical system attributed to Alexandrian Greek mathematician Euclid, which he described in his textbook on geometry: the Elements.
New!!: Parallelogram and Euclidean geometry · See more »
Face (geometry)
In solid geometry, a face is a flat (planar) surface that forms part of the boundary of a solid object; a three-dimensional solid bounded exclusively by flat faces is a polyhedron.
New!!: Parallelogram and Face (geometry) · See more »
Fundamental parallelogram
A Fundamental parallelogram may mean.
New!!: Parallelogram and Fundamental parallelogram · See more »
Heron's formula
In geometry, Heron's formula (sometimes called Hero's formula), named after Hero of Alexandria, gives the area of a triangle by requiring no arbitrary choice of side as base or vertex as origin, contrary to other formulae for the area of a triangle, such as half the base times the height or half the norm of a cross product of two sides.
New!!: Parallelogram and Heron's formula · See more »
If and only if
In logic and related fields such as mathematics and philosophy, if and only if (shortened iff) is a biconditional logical connective between statements.
New!!: Parallelogram and If and only if · See more »
List of self-intersecting polygons
Self-intersecting polygons, crossed polygons, or self-crossing polygons are polygons some of whose edges cross each other.
New!!: Parallelogram and List of self-intersecting polygons · See more »
Median (geometry)
In geometry, a median of a triangle is a line segment joining a vertex to the midpoint of the opposing side, bisecting it.
New!!: Parallelogram and Median (geometry) · See more »
Midpoint
In geometry, the midpoint is the middle point of a line segment.
New!!: Parallelogram and Midpoint · See more »
Parallel (geometry)
In geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel.
New!!: Parallelogram and Parallel (geometry) · See more »
Parallel postulate
In geometry, the parallel postulate, also called Euclid's fifth postulate because it is the fifth postulate in Euclid's ''Elements'', is a distinctive axiom in Euclidean geometry.
New!!: Parallelogram and Parallel postulate · See more »
Parallelepiped
In geometry, a parallelepiped is a three-dimensional figure formed by six parallelograms (the term rhomboid is also sometimes used with this meaning).
New!!: Parallelogram and Parallelepiped · See more »
Parallelogram law
In mathematics, the simplest form of the parallelogram law (also called the parallelogram identity) belongs to elementary geometry.
New!!: Parallelogram and Parallelogram law · See more »
Point reflection
In geometry, a point reflection or inversion in a point (or inversion through a point, or central inversion) is a type of isometry of Euclidean space.
New!!: Parallelogram and Point reflection · See more »
Polygon
In elementary geometry, a polygon is a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed polygonal chain or circuit.
New!!: Parallelogram and Polygon · See more »
Quadrilateral
In Euclidean plane geometry, a quadrilateral is a polygon with four edges (or sides) and four vertices or corners.
New!!: Parallelogram and Quadrilateral · See more »
Rectangle
In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles.
New!!: Parallelogram and Rectangle · See more »
Reflection symmetry
Reflection symmetry, line symmetry, mirror symmetry, mirror-image symmetry, is symmetry with respect to reflection.
New!!: Parallelogram and Reflection symmetry · See more »
Rhomboid
Traditionally, in two-dimensional geometry, a rhomboid is a parallelogram in which adjacent sides are of unequal lengths and angles are non-right angled.
New!!: Parallelogram and Rhomboid · See more »
Rhombus
In plane Euclidean geometry, a rhombus (plural rhombi or rhombuses) is a simple (non-self-intersecting) quadrilateral whose four sides all have the same length.
New!!: Parallelogram and Rhombus · See more »
Right angle
In geometry and trigonometry, a right angle is an angle of exactly 90° (degrees), corresponding to a quarter turn.
New!!: Parallelogram and Right angle · See more »
Right triangle
A right triangle (American English) or right-angled triangle (British English) is a triangle in which one angle is a right angle (that is, a 90-degree angle).
New!!: Parallelogram and Right triangle · See more »
Rotational symmetry
Rotational symmetry, also known as radial symmetry in biology, is the property a shape has when it looks the same after some rotation by a partial turn.
New!!: Parallelogram and Rotational symmetry · See more »
Simple polygon
In geometry a simple polygon is a flat shape consisting of straight, non-intersecting line segments or "sides" that are joined pair-wise to form a closed path.
New!!: Parallelogram and Simple polygon · See more »
Square
In geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, or (100-gradian angles or right angles). It can also be defined as a rectangle in which two adjacent sides have equal length. A square with vertices ABCD would be denoted.
New!!: Parallelogram and Square · See more »
Square number
In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself.
New!!: Parallelogram and Square number · See more »
Tangent
In geometry, the tangent line (or simply tangent) to a plane curve at a given point is the straight line that "just touches" the curve at that point.
New!!: Parallelogram and Tangent · See more »
The College Mathematics Journal
The College Mathematics Journal, published by the Mathematical Association of America, is an expository journal aimed at teachers of college mathematics, particular those teaching the first two years.
New!!: Parallelogram and The College Mathematics Journal · See more »
Trapezoid
In Euclidean geometry, a convex quadrilateral with at least one pair of parallel sides is referred to as a trapezoid in American and Canadian English but as a trapezium in English outside North America.
New!!: Parallelogram and Trapezoid · See more »
Triangle
A triangle is a polygon with three edges and three vertices.
New!!: Parallelogram and Triangle · See more »
Viviani's theorem
Viviani's theorem, named after Vincenzo Viviani, states that the sum of the distances from any interior point to the sides of an equilateral triangle equals the length of the triangle's altitude.
New!!: Parallelogram and Viviani's theorem · See more »
Redirects here:
Area of a parallelogram, Diags. bisect each other, Diags. of //gram, Opp. angles equal, Opp. angles of //gram, Paralelagram, Paralelagrams, Paralellagram, Paralellagrams, Paralellogram, Paralellograms, Paralelogram, Paralelograms, Parallelagram, Parallelagrams, Parallellagram, Parallellagrams, Parallellogram, Parallellograms, Parallelograms, Parralelagram, Parralelagrams, Parralellagram, Parralellagrams, Parralellogram, Parralellograms, Parralelogram, Parralelograms, Parrallelagram, Parrallelagrams, Parrallellagram, Parrallellagrams, Parrallellogram, Parrallellograms, Parrallelogram, Parrallelograms, ▰, ▱.
References
[1] https://en.wikipedia.org/wiki/Parallelogram
