Visualizing Areas

I recently created these for my 7th-graders to do/try individually on quizzlets. The task is to find the area for each of these shapes. I thought I'd share them here, since sometimes it's hard to find problems with the right level of difficulty in textbooks and stuff. After some hands-on play with geometry ideas and formulas, I was mostly interested in the kids being able to categorize/visualize objects and their relationship to one another.

(Even though they're familiar with trapezoids -- which, by the way, the Europeans call trapeeeeezia, or trapeeeeezium in singular form -- by now, this one below tripped many of them up because the diagonal lines don't "look" parallel. We had to discuss afterwards about what happens when you are walking along a street, make a 90-degree right turn, and then another 90-degree right turn. Are you walking parallel to the original street?)

I was pleased that they did very well on the two below, since these shapes are a bit less standard. On the quizzlet, they had to both find the area and explain the process. Go 7th-graders!