yes it is possible
Draw a square
The sum of the interior angles of a quadrilateral is 360 degrees. If three of the angles are right angles, that is, of 90 degrees each, the the fourth must be 90 degrees. So you can have a quadrilateral with three right angles but its fourth angle will also be a right angle. So exactly 3 right angles is not possible.
It is possible, but unfortunately, wikianswers makes it impossible to draw any mathematical shape of any kind.
Yes.
show the drawing
Yes.
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.
if a figure is a square, then it is a regular quadrilateral
No it is not possible to draw 1 triangle with 2 right angles because the angles in a triangle should equal to 180 degrees
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
it is not possible
It is a parallelogramIf one of the angles is a right angle (then they all are) and the quadrilateral is a rectangle.If both pairs of sides are equal in length (but none of the angles is a right angle) the quadrilateral is a rhombus.If the sides are equal and one of the angles is a right angle, the quadrilateral is a square.