http://illuminations.nctm.org/Lesson.aspx?id=2523

“The *Stomachion* is an ancient tangram-type puzzle. Believed by some to have been created by Archimedes, it consists of 14 pieces cut from a square. The pieces can be rearranged to form other interesting shapes. In this lesson, students learn about the history of the *Stomachion*, use the pieces to create other figures, learn about symmetry and transformations, and investigate the areas of the pieces.”

I really like the area questions.

Has an Activity Sheet.

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