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.
Yes providing the other 2 angles are acute
if a figure is a square, then it is a regular quadrilateral
it is not possible
No
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