rhombi
Four equal sides
Rhombi is the plural of rhombus, a four-sided figure with all sides equal length—like a square tilted so it stands on one corner.
The floor tiles were arranged as rhombi rather than squares.
The more common plural is rhombuses.
Quadrilateral with paired parallels
- quadrilateralFour-sided closed figure
- polygonMultisided plane figure
- equilateralHaving all sides congruent
- diagonalsLines joining opposite corners
vertices · sides · plane · convex · two-dimensional · Euclidean · congruent · perimeter
Gapless plane coverage
- mosaicInlaid pictorial arrangement
- pavementHard road covering
- patternRecurring arrangement or template
- interlockJoin by overlapping
Penrose · herringbone · parquetry · flooring · backsplash · inlay · lattice · repeat
Medicated tablet for sucking
- playing cardGame deck unit
- suitMatched formal garments
- argyleMulticolored diamond textile pattern
- harlequinMasked comic servant character
Concerning circular movement
- reflectionReturned light or thought
- axisRotation reference line
- bilateralInvolving two parties
- mirrorReflective viewing surface
invariance · balance · proportion · congruence · order · regularity · isometry
Intensely severe or perceptive
- obtuseLacking mental sharpness
- vertexPoint where edges converge
- interiorInside area or region
- exteriorOuter portion
degrees · perpendicular · parallel · opposite angles · supplementary · complementary · adjacent angles
parallelogram
Quadrilateral with paired parallels
- quadrilateralFour-sided closed figure
- polygonMultisided plane figure
- equilateralHaving all sides congruent
diagonals · vertices · sides · plane · convex · two-dimensional · Euclidean · congruent · perimeter · area
tessellation
Gapless plane coverage
- mosaicInlaid pictorial arrangement
- pavementHard road covering
- patternRecurring arrangement or template
Penrose · interlock · herringbone · parquetry · flooring · backsplash · inlay · lattice · repeat · Escher
lozenge
Medicated tablet for sucking
- playing cardGame deck unit
- suitMatched formal garments
- argyleMulticolored diamond textile pattern
harlequin · warning sign · baseball · infield
rotational
Concerning circular movement
- reflectionReturned light or thought
- axisRotation reference line
- bilateralInvolving two parties
mirror · invariance · balance · proportion · congruence · order · regularity · isometry
acute
Intensely severe or perceptive
exterior · degrees · perpendicular · parallel · opposite angles · supplementary · complementary · adjacent angles
rhombirectangles
Four-sided, all right angles
squares · oblongs · circles · ellipses · trapezoids