 K.G.3
3. Identify shapes as two-dimensional (lying in a plane, “ at”) or three-dimensional (“solid”).
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1.G.3
3. Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and
quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares.
Understand for these examples that decomposing into more equal shares creates smaller shares.
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2G.3
3. Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half
of, a third of, etc., and describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical
wholes need not have the same shape.
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4.G.3
3. Recognize a line of symmetry for a two-dimensional gure as a line across the gure such that the gure can be folded
along the line into matching parts. Identify line-symmetric gures and draw lines of symmetry.
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Classify two-dimensional gures into categories based on their properties.
5.G.3
3. Understand that attributes belonging to a category of two-dimensional gures also belong to all subcategories of that cat
egory. For example, all rectangles have four right angles and squares are rectangles, so all squares have four right angles.
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