no
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it is not possible
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
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.
Draw two parallel lines of unequal length, and connect their end points. If you have a right angle, it is a right trapezoid. If the non-parallel sides are equal in length, it is an isosceles trapezoid.
It would be impossible. A trapezoid can't have three right angles. It would just make a rectangle.
No, because then it would be a rectangle.
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
No because then it would then be a square or a rectangle
if a figure is a square, then it is a regular quadrilateral
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, a trapezoid cannot have two acute angles and two obtuse angles. By definition, a trapezoid has only one pair of parallel sides. In a trapezoid, the non-parallel sides are always supplementary, meaning they add up to 180 degrees. Therefore, having two obtuse angles would make it impossible for the other two angles to be acute and still satisfy the properties of a trapezoid.
No.