Students should use their prior knowledge of shapes from kindergarten and first grade to be able to take apart two-dimensional shapes such as cutting out a square from a rectangle, dividing a shape in half, or separating a rectangle into identical triangles. Students must be able to identify and describe the resulting parts using formal and informal geometric language.
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2.8 Geometry and measurement. The student applies mathematical process standards to analyze attributes of two-dimensional shapes and three-dimensional solids to develop generalizations about their properties. The student is expected to: