Free worksheets · Kindergarten
Count the Corners of Shapes: Circle, Triangle, Square Worksheet
Count the corners of a circle, oval, triangle, square and rectangle and write the number in the Corners box.
Free printable
Count the Corners of Shapes: Circle, Triangle, Square
5 questions, one page, US Letter. Print it and do it on paper.
On the sheet: Count each corner once. Write the number in the Corners box. A circle and an oval have no corners.
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About this worksheet
A corner is where two straight sides meet. This page asks how many corners a circle, an oval, a triangle, a square and a rectangle have.
A shape has as many corners as sides, and a child who counts both starts to notice that. The circle and the oval have no corners at all, which the directions remind them of.
A worked example
A rectangle. How many corners?
- Touch the top-left corner: "1."
- Move to the top-right: "2."
- Then the bottom-right: "3," and the bottom-left: "4."
- Write 4 in the Corners box.
Answer: 4
The common mistake
What it looks like: Writing 1 for a circle because it is one shape.
Why it happens: A child may write the number of shapes instead of the number of corners, or feel that a blank box looks wrong.
How to fix it: Run a finger around the circle: there is nowhere it turns a point, so the answer is 0. A corner is a point you can poke.
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 Corners of Shapes: Circle, Triangle, Square
- Tue What they missed, back again
- Wed The next step, when they’re ready
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