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trapezoid

noun
🔊/ˈtræpəzɔɪd/
🔊/ˈtræpəzɔɪd/
 (geometry几何)
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  1. (British English)
    (North American English trapezium)
    a flat shape with four straight sides, none of which are parallel不规则四边形
     (= the same distance apart at every point)    Topics Colours and Shapesc2
  2. (North American English)
    (British English trapezium)
    a flat shape with four straight sides, one pair of opposite sides being parallel (= the same distance apart at every point) and the other pair not parallel梯形
    Topics Colours and Shapesc2
    3. Word Originearly 18th cent.: from modern Latin trapezoides, from late Greek trapezoeidēs, from trapeza ‘table’.