As you may know, there is no standard definition of a trapezoid. That being said, at MobyMax, we are using the inclusive definition of a trapezoid instead of the exclusive definition of a trapezoid. This definition is explained to the students during the "Teach Me" portion of this lesson.
One of our curriculum team members has created a page to further explain the details and clear up any confusion.
You can also exclude your students from this lesson if you do not use the inclusive definition in your district.