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en.wikipedia.org/wiki/Trapezoid

A right trapezoid (also called right-angled trapezoid) has two adjacent right angles. Right trapezoids are used in the trapezoidal rule for estimating areas under a curve. An acute trapezoid has two adjacent acute angles on its longer base edge, while an obtuse trapezoid has one acute and one obtuse angle on each base.

wikidiff.com/trapezoid/trapezium

Trapezium is a synonym of trapezoid. As nouns the difference between trapezoid and trapezium is that trapezoid is (geometry) a (convex) quadrilateral with two (non-adjacent) parallel sides while trapezium is (geometry|british) a four-sided polygon with two sides parallel; a trapezoid (modern sense).

www.quora.com/Whats-the-difference-between-trapezoid-and-trapezium

A trapezium is a 4-sided flat shape with straight sides that has a pair of opposite sides parallel. It is called a trapezoid in US. ( Indians follow the UK version, I guess) A trapezoid is a quadrilateral with NO parallel sides (UK version). Hope ...

en.wikipedia.org/wiki/Trapezium_(bone)

The trapezium is an irregular-shaped carpal bone found within the hand. The trapezium is found within the distal row of carpal bones, and is directly adjacent to the metacarpal bone of the thumb. On its ulnar surface are found the trapezoid and scaphoid bones.: 708

mathworld.wolfram.com/Trapezium.html

Trapezium. There are two common definitions of the trapezium. The American definition is a quadrilateral with no parallel sides; the British definition is a quadrilateral with two sides parallel (e.g., Bronshtein and Semendyayev 1977, p. 174)--which Americans call a trapezoid.. Definitions for trapezoid and trapezium have caused controversy for more than two thousand years.

english.stackexchange.com/questions/65259/trapezium-trapezoid-why-are-the-us...

These are the US definitions... Trapezoid — a 4-sided flat shape with straight sides that has a pair of opposite sides parallel.. Trapezium — a 4-sided flat shape with straight sides and NO parallel sides.. The meanings of the two words are exactly reversed between the US and British interpretations.

www.mathsisfun.com/geometry/trapezoid.html

You can calculate the area when you know the median, it is just the median times the height: Area = mh. Trapezium. A trapezium (UK: trapezoid) is a quadrilateral with NO parallel sides.. The US and UK have their definitions swapped over, like this:

amathsdictionaryforkids.com/qr/t/trapezium.html

Definition notes. trapezoid (US) = trapezium (UK) In Euclidean geometry, a convex quadrilateral with at least one pair of parallel sides is referred to as a trapezoid in American and Canadian English but as a trapezium in English outside North America.

www.mathworksheets4kids.com/trapezoid.php

Get to know the concepts of trapezoids with this stack of worksheets, tailor-made for middle and high-school students. Comprehend the basic properties and solve the problems involving sides, angles and diagonals of a trapezoid; classify trapezoids and calculate the perimeter and area of trapezoids with this set of printable worksheets.

www.healthline.com/human-body-maps/trapezium-bone

The scaphoid is located directly behind it, and the trapezoid is located to its side. The trapezium has three contact surfaces. These surfaces provide articulation points with other bones.