No, because then it would be a rectangle.
no
It would be impossible. A trapezoid can't have three right angles. It would just make a rectangle.
No, it is not possible to draw a trapezoid with three right angles. A trapezoid is defined as a quadrilateral with at least one pair of parallel sides. If three angles are right angles, the fourth angle would need to be a right angle as well to satisfy the angle sum property of quadrilaterals, which would make all four angles right angles, resulting in a rectangle rather than a trapezoid.
The sum of all four angles is 360 degrees. If three of the angles were right angles then the fourth would have to be a right angle. You would then have a rectangle or a square, but not a trapezium.
it is not possible
if a figure is a square, then it is a regular quadrilateral
No because then it would then be a square or a rectangle
Not possible - that would mean the final angle would also have to be ninety degrees - making it a square or rectangle.
It is impossible to have a triangle with 3 right angles. It is possible to draw a triangle with three right angles on the surface of a sphere: www.metacafe.com/watch/769025/270_degree_triangle_yes_3_right_angles
Yes.
Well, honey, to draw a trapezoid with no right angles, you start by drawing two parallel lines of different lengths. Then you connect the ends of those lines with two slanted lines, making sure they're not perpendicular. Voila, you've got yourself a trapezoid with all angles different from 90 degrees. Now go show off your fancy geometric skills!
No.