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Q: Does a trapezoid have one or two right angles?

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A right trapezoid has at least two right angles.

A trapezoid can have up to two right, 90 degree angles for it still to be classified as a trapezoid.

____________ / | /_____________ | Crappy drawing, I know, but a right trapezoid has two right angles(right side of picture), and two supplimentary non-right angles(left side of drawing). This is still a trapezoid because in order to be a trapezoid, there must be one and only one pair of parallel lines, and four sides. That's it, thus this is a possible trapezoid.

At most two.

A trapezoid has one pair of parallel side and can have two adjacent angles that are right.

Related questions

A right trapezoid has at least two right angles.

A trapezoid can have either none or two right angles.

A trapezoid has four sides, where two of it's sides are opposite and parallel. If a trapezoid has two right angles that are adjacent to one another, it is called a right trapezoid.

A trapezoid can have up to two right, 90 degree angles for it still to be classified as a trapezoid.

A trapezium can have at most two right angles. But it need not have any.It is a quadrilateral and so the sum of its four angles must be 360 degrees. If there are 3 right angles then they sum to 3*90 = 270 degrees and so the fourth must be 360-270 = 90 degrees. Therefore it has four right angles and then is no longer a trapezium but a rectangle!

It has no right angles. It has two acute angles.

____________ / | /_____________ | Crappy drawing, I know, but a right trapezoid has two right angles(right side of picture), and two supplimentary non-right angles(left side of drawing). This is still a trapezoid because in order to be a trapezoid, there must be one and only one pair of parallel lines, and four sides. That's it, thus this is a possible trapezoid.

yes it can

It can, but need not.

A right trapezoid can have no congruent sides and two right angles.

That would be a trapezoid. A trapezoid does not have to have two right angles it only needs to have two parallel sides. There is not a name for the exact quadrilateral you are looking for but the shape is still within the definition of a trapezoid.

A trapezoid