Recognize that area does not change when 2-dimensional figures are cut apart and rearranged. (0406.4.9)

Links verified on 11/15/2011

1. Area and Perimeter of Regular and Irregular Polygons - [22 pages] fifth grade unit plan from the Arizone Department of Education that deals with the concept of this standard
2. Developing Geometry Understandings and Spatial Skills through Puzzlelike Problems with Tangrams: Tangram Puzzles - lesson plan from NCTM
3. The Pythagorean Theorem with Tangrams - lesson plan using tangrams as an introduction to the Pythagorean Theorem
4. Tangram - six puzzles to select from
5. Tangram Game - rearrange pieces to make a new shape
6. Tangram Puzzle - use all seven geometric shape pieces to make another shape

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