1st Grade 1st Grade Geometry: 2D Shapes and Their Sides
Name each 2D shape and tell how many sides and corners it has.
- Homework
- Centers
- Review
- Morning Work
Download the Free Printable PDF
No sign-up required. Clean, low-ink US Letter format.
- Grade
- 1st Grade
- Subject
- Math
- Skill
- Geometry
- Topic
- naming 2D shapes and counting sides and corners
- Difficulty
- Easy
- Time
- 12 minutes
- Pages
- 2 (incl. answer key)
- Format
- Printable PDF (US Letter)
- Answer key
- Included
- Best for
- homework, centers, review, morning work
Worksheet details
What This Worksheet Practices
Students will name common 2D shapes and count their sides and corners (vertices).
- Naming 2D shapes
- Counting sides and corners
- Telling shapes apart by their attributes
Inside This Printable
Student directions: Write the name of each shape. Then write how many sides and corners it has.
Worked example
A triangle has 3 sides and 3 corners.
Sample questions
- Name the shape and its sides/corners:
- Name the shape and its sides/corners:
- Name the shape and its sides/corners:
The PDF contains 6 practice questions plus 2 challenge questions.
Worksheet Preview
Shapes by their attributes
In first grade, students describe 2D shapes by their attributes — the number of sides and corners — not just by how they look. A triangle has 3 sides and 3 corners; a square has 4 of each. A circle has none.
How to use it
Go on a shape hunt around the house and count sides and corners on real objects. Note that a square is a special rectangle. Pairs with halves and fourths.
👩🏫 Teacher note
First graders describe shapes by attributes (number of sides and corners), not just by look. Note that a square is a special rectangle with 4 equal sides.
🏠 Parent note
Go on a shape hunt around the house — find circles (clock), rectangles (door), triangles (signs).
Common Mistakes to Watch For
- Confusing a square and a rectangle
- Miscounting corners
Answer Key
The shape name and its number of sides and corners are given.
⬇ Download Answer Key (PDF)Learn this skill first
Take the free lesson on geometry — worked examples and practice exercises, then come back to this worksheet.
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Frequently Asked Questions
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Does it come with an answer key?
Yes — a complete answer key is included.
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