## Geometry

## 1.G.1

__CCSS.Math.Content.1.G.A.1__Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.

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## 1.G.2

__CCSS.Math.Content.1.G.A.2__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.

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## 1.G.3

__CCSS.Math.Content.1.G.A.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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