First Grade Geometry

Recognize shapes based on attributes, compose single and composite shapes and partition shapes.  Just click on the blue links to display or print pdfs.
Standards

Practice Pages
Reason with shapes and their attributes - Cluster 1.

Standard 1.G.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.
Attributes of Triangles

Answers 1.G.1.a


Attributes of Circles

Answers 1.G.1.b

Standard 1.G.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.

Square-Triangle Composite

Answers 1.G.2.a


Trapezoid-Half Circle Composite

Answers 1.G.2.b

Standard 1.G.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.

Circle Partitions

Answers 1.G..3.a


Describing and Comparing Partitions

Answers 1.G.3.b