parallelogram

Four-sided tilted shape

A parallelogram is a four-sided polygon whose opposite sides are parallel and equal in length.

Rectangles, rhombuses, and squares are all parallelograms.

The shape appears frequently in geometry problems and architectural designs: Calculate the area of the parallelogram.

properties

opposite

Reverse or contrary thing

congruentIdentical in form
diagonalSlanting line or path
bisectDivide into two equal portions

adjacent · sides · vertices · angles · supplementary · consecutive · midpoint · base · height · altitude

geometry

area

Extent of surface

perimeterShape's outer edge length
planeWinged flying vehicle
two-dimensionalHaving only two axes

Euclidean · coordinate · vector · proof · theorem · formula · construction · compass · straightedge · grid

quadrilateral

rhombus

Equilateral parallelogram

rectangleFour-sided, all right angles
trapezoidPolygon with parallel pair
squareRhombus with right angles

kite · polygon · quadrangle · deltoid · diamond · lozenge · chevron · rhomboid · oblong · equilateral

symmetry

rotation

Turning on an axis

centralIn the middle, primary
invariantRemaining always constant
mappingDiagram of correspondences

transform · congruence · reflection · center

Categories

quadrilateralsrectangle, square, rhombus, trapezoid, kite
geometryangles, circles, angle, shapes, lines
geometry termscircle, line, rectangle, side, square
geometric shapessphere, triangle, square, cone, rectangle
polygonspolygon, triangle, pentagon, hexagon, heptagon
shapescircle, square, triangle, rectangle, oval

Opposites

geometric side relationships

parallelogramtrapezoid

Polygon with parallel pair

trapezium · kite · arrowhead · dart

angular regularity

parallelogramrectangle

Four-sided, all right angles

square · rhombus

regularity/symmetry

parallelogramirregular polygon

Many-sided shape, sides differ

Family

Familiarity: Top 100,000
Profile: Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G