Kindergarten Count Sides and Corners Worksheet
Look at each shape and count its sides or corners.
- Centers
- Homework
- Morning Work
- Intervention
Download the Free Printable PDF
No sign-up required. Clean, low-ink US Letter format.
- Grade
- Kindergarten
- Subject
- Math
- Skill
- Geometry
- Topic
- sides and corners of 2D shapes
- Difficulty
- Easy
- Time
- 10 minutes
- Pages
- 2 (incl. answer key)
- Format
- Printable PDF (US Letter)
- Answer key
- Included
- Best for
- centers, homework, morning work, intervention
Worksheet details
What This Worksheet Practices
Students will count the number of sides and corners (vertices) of common 2D shapes.
- Counting sides of a shape
- Counting corners (vertices)
- Knowing a circle has no sides or corners
Inside This Printable
Student directions: Count the sides or corners of each shape. Write your answer on the line.
Worked example
A triangle has 3 sides and 3 corners.
Sample questions
- How many sides?
- How many corners?
- How many sides?
The PDF contains 6 practice questions plus 2 challenge questions.
Worksheet Preview
Shapes have parts you can count
Naming a shape is one skill; describing it by its parts is the next. A square isn’t just a square — it has 4 straight sides and 4 corners. Counting sides and corners helps children notice why shapes are different, and sets up sorting and building shapes later.
How to use it
Have your child start at one corner and trace around the shape, counting each side or each point once. This stops the double-counting that happens when kids lose their starting place. The circle is the important special case — it has no straight sides and no corners at all. Builds on naming 2D shapes.
👩🏫 Teacher note
Have students put a finger on one corner and count around the shape so they don't double-count. Connect sides and corners: a triangle has 3 of each.
🏠 Parent note
Trace around the shape with a finger, counting each straight edge (side) or each point (corner).
Common Mistakes to Watch For
- Counting a corner twice when going around the shape
- Saying a circle has sides or corners
Answer Key
The answer key lists the number for each shape.
⬇ 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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