Geometry Students describe, sort and compare two-dimensional (2-D) and three-dimensional (3-D) shapes and think about questions like the following: What makes a rectangle a rectangle? How are rectangles different from squares? Students study rectangles and rectangular prisms, and consider which properties are important in describing these shapes. They combine and decompose both 2-D and 3-D shapes and explore the relationships between shapes, particularly as they work with pattern blocks and Geoblocks. As they develop knowledge about how shapes are related, they are learning about the important features of shapes.
Benchmarks • Identify the number of sides of a polygon • Identify the number of rows and the number of squares in each row in an array • Identify rectangles as four-sided shapes with four right angles • Identify the number of faces on a rectangular prism and show which faces are congruent • Make a symmetrical picture based on an image provided