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Common Core Teaching Resources

CCSS.MATH.CONTENT.1.G.A.2

In Grade 1 Standards for Mathematical Practice Geometry Reason with shapes and their attributes
Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape.