2.G.A. Reason with shapes and their attributes.

2.G.A.1. Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces.* Identify triangles, quadrilaterals, pentagons, hexagons, and cubes.

• Polygons

2.G.A.2. Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.

• Partitioning a Rectangle into Unit Squares

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.

• Representing Half of a Rectangle
• Which Pictures Represent One Half?