Free worksheets · Kindergarten
Count the Sides of Shapes: Circle, Triangle, Square Worksheet
Count the straight sides of a circle, oval, triangle, square and rectangle and write the number in the Sides box.
Free printable
Count the Sides of Shapes: Circle, Triangle, Square
5 questions, one page, US Letter. Print it and do it on paper.
On the sheet: Count each straight side once. Write the number in the Sides box.
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About this worksheet
A side is a straight edge of a shape. This page asks how many sides each shape has: a circle, an oval, a triangle, a square and a rectangle.
Counting sides is how a child learns why a triangle is a triangle. The circle and oval are a good puzzle too: they have no straight sides, so the answer is 0.
A worked example
A triangle. How many sides?
- Put a finger on one side and say "1."
- Move around the shape to the next side: "2."
- Keep going: "3." You are back where you started.
- Write 3 in the Sides box.
Answer: 3
The common mistake
What it looks like: Writing 1 for a circle, or counting one side of a square twice.
Why it happens: A circle's curved edge feels like one side, and going around a shape it is easy to lose track of where you began.
How to fix it: A side has to be straight, so a circle and an oval have 0. For other shapes, put a small dot on the first side before counting, and stop when you reach the dot again.
Ten minutes a day, on paper. We plan what comes next.
A printed page and a pencil. No screen, no login for your child. Snap a photo when they’re done: AI scores it, and what they missed comes back on the sheets that follow.
- Mon Count the Sides of Shapes: Circle, Triangle, Square
- Tue What they missed, back again
- Wed The next step, when they’re ready
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