yes it is possible
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.
Draw a square
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 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.
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