Does a trapezoid have right angles?

Answer 1

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!

Answer 2

A trapezoid can have at most two right angles and as few as none but it must have two sides that are parallel.
Not necessarily. A trapezoid is any four-sided polygon with two sides parallel. A special case is a right trapezoid, in which on side is perpendicular to the two parallel sides, forming two right angles. A trapezoid actually cannot have merely one right angle, it can have zero or two.
Not necessarily. A trapezoid is any four-sided polygon with two sides parallel. A special case is a right trapezoid, in which on side is perpendicular to the two parallel sides, forming two right angles. A trapezoid actually cannot have merely one right angle, it can have zero or two.

Answer 3

In general a trapezoid does not have to have right angles, but a special kind of trapezoid does. It can have 2 right angles providing that the other 2 angles are an obtuse and an acute angle.

Answer 4

A trapezoid can have none or two right angles.

Answer 5

Yes