What is covered under 1.G.A.1?

1.G.A.1 sits in the Geometry strand for Grade 1. This page gathers the free interactive activities and worksheets aligned to it.

Are these 1.G.A.1 resources free?

Yes. Every activity and worksheet aligned to 1.G.A.1 is free to use online and to print — no signup and no paywall.

Who are these 1.G.A.1 activities for?

They are built for Grade 1 teachers and learners following the Common Core Geometry progression, and work for class, small-group, or home practice.

1.G.A.1 — Free Activities & Worksheets

Free Common Core 1.G.A.1 activities and worksheets for Grade 1, aligned to the Geometry strand. Browser-playable interactive exercises plus printable PDFs, available in all 11 supported languages — no signup, no paywall.

Grade 1·Geometry·1.G.A.1

Interactive activities

Grade 1·1.G.A.1

Defining Attributes of Shapes — Is It Still a Triangle? (Grade 1 Geometry)

A free interactive Grade 1 geometry activity: a triangle is still a triangle even when its colour, size, or direction changes. Drag each shape into the right box — sort by what it IS (its number of sides), not how it looks. Common Core 1.G.A.1.

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Frequently asked questions

What is covered under 1.G.A.1?: 1.G.A.1 sits in the Geometry strand for Grade 1. This page gathers the free interactive activities and worksheets aligned to it.
Are these 1.G.A.1 resources free?: Yes. Every activity and worksheet aligned to 1.G.A.1 is free to use online and to print — no signup and no paywall.
Who are these 1.G.A.1 activities for?: They are built for Grade 1 teachers and learners following the Common Core Geometry progression, and work for class, small-group, or home practice.

Interactive activities

Defining Attributes of Shapes — Is It Still a Triangle? (Grade 1 Geometry)

Related standards in 1.G

Frequently asked questions