  Pentominos
What do pentominos have to do with geometry?
NCTM 3-5.8.1. identify, compare, and analyze attributes of two- and three-dimensional shapes and develop vocabulary to describe the attributes. Problem Solving 3-5.18.2. solve problems that arise in mathematics and in other contexts. Connections 3-5.21.1. recognize and use connections among mathematical ideas. 6-8 Geometry 6-8.8.0 Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships. 6-8.8.1. precisely describe, classify, and understand relationships among types of two- and three-dimensional objects using their defining properties. 6-8.11.0 Use visualization, spatial reasoning, and geometric modeling to solve problems. 6-8.11.5. recognize and apply geometric ideas and relationships in areas outside the mathematics classroom, such as art, science, and everyday life. Problem Solving 6-8.18.2. solve problems that arise in mathematics and in other contexts.