Arizona's College and Career Ready Standards
AZ.2.G. Geometry (G)
2.G.A. Reason with shapes and their attributes.
2.G.A.3. Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, fourths, half of, third of, fourth of, and describe the whole as two halves, three thirds, or four fourths. Recognize that equal shares of identical wholes need not have the same shape.