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trapezium
The term is subject to a significant regional divergence in mathematical terminology. In American English, a trapezium refers to a quadrilateral with no parallel sides, while a trapezoid refers to one with at least one pair of parallel sides. In British English, these definitions are exactly reversed: a trapezium has parallel sides, and a trapezoid has none.
Because of this contradiction, the word can cause confusion in international academic contexts. When communicating across regions, it is often clearer to describe the geometric properties of the shape explicitly rather than relying on the term alone.
Meanings
Examples
The teacher asked the students to calculate the area of the trapezium on the board.
Is this shape a parallelogram or a trapezium?
Is this shape a parallelogram or a trapezium?
The architect designed the window in the shape of a trapezium to fit the sloped ceiling.
I wonder if I can fit a trapezium into this puzzle.
The X-ray shows a clear fracture in the trapezium bone.
Pain in the trapezium can make it very difficult to move your thumb.
The surgeon carefully examined the joint between the trapezium and the first metacarpal.
You have some inflammation around your trapezium.