Pentominos
What do pentominos have to do with geometry?
Washington State GLE's

 Washington Content Standards Mathematics By Grade Level Grade 5 (GLEs) EALR 1 The student understands and applies the concepts and procedures of mathematics. Component 1.2 Understand and apply concepts and procedures from measurement. Procedures, Precision, and Estimation MA-5-1.2.5 Understand and apply formulas to measure area of rectangles and right triangles. MA.5.1.2.5.a. Explain how to find the perimeter or area of any rectangle using a rule. Component 1.3 Understand and apply concepts and procedures from geometric sense. Locations and Transformations MA-5-1.3.4 Apply understanding of translations (slides) or reflections (flips) to congruent figures. MA-5-1.3.4.a. Identify a specific transformation as a translation (slide) or reflection (flip). Grade 6 (GLEs) EALR 1 The student understands and applies the concepts and procedures of mathematics. Component 1.3 Understand and apply concepts and procedures from geometric sense. Locations and Transformations MA-6-1.3.4 Apply understanding of rotations (turns) to 2-dimensional figures. MA-6-1.3.4.d. Describe a rotation so that another person could draw it. Grade 7 (GLEs) EALR 1 The student understands and applies the concepts and procedures of mathematics. Component 1.3 Understand and apply concepts and procedures from geometric sense Locations and Transformations MA-7-1.3.4 Understand and apply combinations of translations (slides) and reflections (flips) to two-dimensional figures. MA-7-1.3.4.a. Identify and explain whether a shape has been translated (slid) or reflected (flipped) with or without a grid.