This chart gives the name of each polygon, the shape, a description and the formula for finding the area of each. It is a great resource for students to put in their binder or notebook to refer to for classwork or homework.
There is also an accompanying activity worksheet. I use tape to outline each shape on the floor in our hallway. Blue painters tape works best. Then the students use the Polygon Reference sheet to determine the shape of each polygon, they write the formula and then calculate the area of each shape. Upon completion, we gather around each shape and talk about other ways that we could have come up with the area (breaking the trapezoid into a rectangle and two triangles for instance). I always find this activity engaging and very successful for understanding how to calculate area of shapes. It is also a great way to introduce the topic of composite figures. Enjoy!