parallelogram

Noun
  1. is a type of: quadrangle, quadrilateral, tetragon - a four-sided polygon
    subtypes:
    • diamond, rhomb, rhombus - a parallelogram with four equal sides; an oblique-angled equilateral parallelogram
    • rhomboid - a parallelogram with adjacent sides of unequal lengths; an oblique-angled parallelogram with only the opposite sides equal
    • rectangle - a parallelogram with four right angles

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