Composition and Decomposition of Shapes
This website focuses on the composition and decomposition of both two-dimensional (2D) and three-dimensional (3D) shapes. Composing and decomposing shapes is an important part of early geometry. It is the foundation for understanding many other areas of math, especially number and arithmetic, such as part-whole relationships and fractions. This website includes a section on both 2D and 3D shapes as well as embedded geometric figures. In each section you will find more information about what these are as well as the learning trajectories for each. On this website you will also find many activities to do with children to help develop these skills as well as resources like printable Block Pattern Puzzles.
Important Terms:
Composition – arranging shapes together to form a whole
Decomposition – taking shapes apart and separating them into smaller pieces
2D Shapes – geometric shapes consisting of width and height (ex. triangle, square)
3D Shapes – geometric shapes consisting of height, width and depth (ex. cube, pyramid)
Important Terms:
Composition – arranging shapes together to form a whole
Decomposition – taking shapes apart and separating them into smaller pieces
2D Shapes – geometric shapes consisting of width and height (ex. triangle, square)
3D Shapes – geometric shapes consisting of height, width and depth (ex. cube, pyramid)
Imprecise Geometry with Doug Clements
Activity: Marshmallow Shapes
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Skills
This activity incorporates the composition and decomposition of 2D and 3D geometric shapes as well as embedded geometric figures.
This activity incorporates the composition and decomposition of 2D and 3D geometric shapes as well as embedded geometric figures.
