Geometry - Quadrilaterals, Properties, Solving problems with algebra

The only thing I did not like and will change when I copy again is that the shapes are not identified. We had to assume rectangles, rhombi and squares on pages 2 and 3, and you know what happens when you assume! Also, on page 5, given a 100° and find x° at B, what shape is that? Can anyone explain how to find x.

Nice review for my students! thanks so much :)