This page provides samples of 1st Grade Geometry Activities aligned with the Common Core State Standards. All activities are suitable for use in Math Centers, small group or whole class settings and are designed to provide opportunities for students to communicate their reasoning and mathematical thinking. All sample files are in PDF format. Sample activities listed in **blue** are available for immediate download. Activities listed in ****grey **are included in our **1st Grade Math Centers** eBook.

**Reason with shapes and their attributes **

**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.

**Possible Activities:**My 2D Shape Book

Geoboard Squares

When a Line Bends ...

**Also included in 1st Grade Math Centers:**

**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.

**Possible Activities:**

Putting Shapes Together

Pattern Block Triangles

Tangram Squares**Math Read Aloud Task Cards:**Grandfather Tang's Story

**Also included in 1st Grade Math Centers:** Make a Hexagon**

**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.

**Possible Activities:**

**Also included in 1st Grade Math Centers:** Fraction Pictures** Equal Parts of a Square (ver. 2)**