quadrilaterals
Squares and trapezoids
Quadrilaterals are four-sided polygons—closed shapes with four straight edges and four corners.
The category includes squares, rectangles, parallelograms, trapezoids, and rhombuses, among others.
We learned to calculate the area of various quadrilaterals in geometry class.
The term comes from Latin words meaning "four sides," and these shapes appear everywhere from floor tiles to picture frames to baseball diamonds.
Rhombus with right angles
- rectangleFour-sided, all right angles
- rhombusEquilateral parallelogram
- parallelogramQuadrilateral with paired parallels
- trapezoidPolygon with parallel pair
kite · trapezium · oblong · diamond · lozenge · deltoid · irregular · tangential
Multisided plane figure
- four-sidedHaving four straight boundaries
- verticesCorner points of shapes
- anglesRotation between intersecting lines
- diagonalsLines joining opposite corners
perimeter · area · congruent · similar · parallel · perpendicular · interior angles · exterior angles
Flat pieces covering floors
- screensDisplays or filters
- playing cardsNumbered suited game pieces
- envelopesPaper containers for letters
- booksBound written works
picture frames · doors · bricks · paving stones · soccer field · basketball court · land parcels · architectural plans
Academic period for calculations
- worksheetExercise page for students
- protractorAngle-measuring instrument
- rulerOne who governs
- compassDevice showing cardinal directions
graph paper · coordinate plane · formula · theorem · properties · classification · Venn diagram · homework
square
Rhombus with right angles
- rectangleFour-sided, all right angles
- rhombusEquilateral parallelogram
- parallelogramQuadrilateral with paired parallels
trapezoid · kite · trapezium · oblong · diamond · lozenge · deltoid · irregular · tangential · equilateral
polygon
Multisided plane figure
- four-sidedHaving four straight boundaries
- verticesCorner points of shapes
- anglesRotation between intersecting lines
diagonals · perimeter · area · congruent · similar · parallel · perpendicular · interior angles · exterior angles · convex
floor tiles
Flat pieces covering floors
- screensDisplays or filters
- playing cardsNumbered suited game pieces
- envelopesPaper containers for letters
picture frames · books · doors · bricks · paving stones · soccer field · basketball court · land parcels · architectural plans · fabric patterns
math class
Academic period for calculations
- worksheetExercise page for students
- protractorAngle-measuring instrument
- rulerOne who governs
compass · graph paper · coordinate plane · formula · theorem · properties · classification · Venn diagram · homework · quiz
quadrilateralscubes
Equal-sided solid blocks
tetrahedra · polyhedra · points · lines · line segments