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.

Standard:

1.G.A.2

Description:

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.

Standard:

1.G.A.3

Description:

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.

Standard:

1.6.A

Description:

classify and sort regular and irregular two-dimensional shapes based on attributes using
informal geometric language;

Standard:

1.6.B

Description:

distinguish between attributes that define a two-dimensional or three-dimensional figure
and attributes that do not define the shape;

Standard:

1.6.C

Description:

create two-dimensional figures, including circles, triangles, rectangles, and squares, as
special rectangles, rhombuses, and hexagons;

Standard:

1.6.D

Description:

identify two-dimensional shapes, including circles, triangles, rectangles, and squares, as
special rectangles, rhombuses, and hexagons and describe their attributes using formal
geometric language;

Standard:

1.6.E

Description:

identify three-dimensional solids, including spheres, cones, cylinders, rectangular prisms
(including cubes), and triangular prisms, and describe their attributes using formal
geometric language;

Standard:

1.6.F

Description:

compose two-dimensional shapes by joining two, three, or four figures to produce a
target shape in more than one way if possible;

Standard:

1.6.G

Description:

partition two-dimensional figures into two and four fair shares or equal parts and describe
the parts using words; and

Standard:

1.6.H

Description:

identify examples and non-examples of halves and fourths.