How many polygons can you make with 4 right angles?

A polygon with four right angles is a quadrilateral. The most common example is a rectangle, but other variations, such as squares and certain types of trapezoids, also fit this criterion. However, all such polygons must have four sides to maintain the four right angles, so the answer is that you can create multiple quadrilateral shapes, but they all will share the characteristic of having four right angles.