In North American usage, a trapezoid is a four-sided figure with two parallel sides. Outside of North America, the same figure is called a trapezium.
In general usage, the name is applied only to figures that have exactly two parallel sides. Figures that have two pairs of parallel sides are called by their more-specific name, e.g. parallelogram, rectangle, etc. depending on their angles and side lengths.
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A trapezoid is a 4 sided quadrilateral shape
Quadrelateral
It is an isosceles trapezoid
Yes, there are right trapezoid, a regular trapezoid and isosceles trapezoid and more
A trapezoid and a triangle can make a triangle or another trapezoid, among others.