Question

Can you draw a trapezoid with three angles

Answer 1

Draw a rectangle depending on the definition there are two

If a trapezoid is defined as a polygon with four sides (that is, quadrilateral) and two sides of it are parallel to each other, than a rectangle can be considered as a type of trapezoid.
In this case all theorems proven for a trapezoid are true for rectangles.

If, however, the definition states that two sides of a quadrilateral must be parallel and two other must not then rectangle is not a particular type of trapezoid so you can't draw a type of trapezoid with 3 right angles based on their defintion.

Answer 2

No, because a trapezoid has four sides.