Did you know that there are THREE ways to define a trapezoid, or a trapezium as this polygon is classified in many countries? More importantly, do you know which definition you’re supposed to be teaching? In Sorting Tricky Trapezoids (or Trapeziums), I explain all three definitions and provide two quadrilateral sorting activities for exploring the attributes of trapezoids or trapeziums. One is a printable hands-on activity for partners, and the other is a digital Google Slides activity. If you