2.G.A.3 Worksheets - Common Core Math - Education 2.G.A.3 Worksheets CCSS.MATH.CONTENT.2.G.A.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."