Yes, that is what a trapezoid is.
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NO. The parallel sides of a trapezium are never congruent. So a trapezium cannot have 4 congruent sides. So the answer to the question is "No, it is not".
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Since a trapezoid is a quadrilateral whose bases are parallel and not congruent, then one of its sides can be perpendicular to its bases (as the shortest distance between two parallel lines). Such a trapezoid is called a right trapezoid.
rhombus, trapezoid
Rhombus. Because a Rhombus has four congruent sides but no right angles.
This is all about the vocabulary. First, quadrilateral, ok so a quadrilateral is a shape with four sides. Next, congruent; congruent basically means equal. So we can say what shape has four equal sides and right angles? Your basic shapes with four sides would be a trapezoid, a parallelogram, a rhombus, a rectangle or a square. The square is the only one of these that fits.
Trapezoid