New shapes can be made by joining or partitioning existing shapes
TLF ID A006154
This 2-week unit develops students' understanding of how new shapes can be made from existing shapes by exploring the attributes of shapes, and by using combination and partitioning. Students learn that: two-dimensional shapes can be made by joining and partitioning existing shapes; shapes have attributes that are necessary for classification as that shape; shapes and objects can be halved in different ways; new shapes can be created by adding or removing sides; and that numbers, like shapes, have smaller numbers hiding inside of them.