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🔺 2nd grade math · Shapes & Space

Count sides and corners

Triangle 3, quadrilateral 4, pentagon 5, hexagon 6. A polygon has the same number of angles as sides.

Worked example

What is this polygon called? Count its sides.
Answer: triangle
Count the sides: 3. A shape with 3 sides is a triangle.

For grown-ups: Shapes by number of sides and angles; partition rectangles into rows and columns. Below: three problems to try with the worked answers, and a free printable sheet. Children can practise the same skill as a game, with no sign-up and no ads.

  • CCSS 2.G.A.1–2
What this practises, for teachers

Practices shapes by number of sides and angles; partition rectangles into rows and columns (2.G.A.1–2). A printable sheet with its answer key, worked answers on the page, no accounts.

▶ Practise it

For your class

🖨️ Printable sheet and key

On the board with this skill:

Try three

  1. What is this polygon called? Count its sides.
    Show the answer and how
    Answer: quadrilateral
    Count the sides: 4. A shape with 4 sides is a quadrilateral. Quadrilateral means 4 sides.
  2. What is this polygon called? Count its sides.
    Show the answer and how
    Answer: pentagon
    Count the sides: 5. A shape with 5 sides is a pentagon.
  3. What is this polygon called? Count its sides.
    Show the answer and how
    Answer: pentagon
    Count the sides: 5. A shape with 5 sides is a pentagon.

Before and after

Learn first: What makes a shape (1st)

Comes next: Squares, rectangles, rhombuses (3rd)

Name: ____________________Date: ____________Score: ____ / 12

Count sides and corners (2nd grade)

  1. What is this polygon called? Count its sides.
  2. What is this polygon called? Count its sides.
  3. What is this polygon called? Count its sides.
  4. What is this polygon called? Count its sides.
  5. What is this polygon called? Count its sides.
  6. What is this polygon called? Count its sides.
  7. What is this polygon called? Count its sides.
  8. What is this polygon called? Count its sides.
  9. What is this polygon called? Count its sides.
  10. What is this polygon called? Count its sides.
  11. Which polygon has 5 angles?
    ABC
  12. What is this polygon called? Count its sides.

Answer key

  1. pentagon
  2. quadrilateral
  3. triangle
  4. hexagon
  5. quadrilateral
  6. hexagon
  7. pentagon
  8. pentagon
  9. hexagon
  10. triangle
  11. Picture C
  12. quadrilateral

More 2nd grade skills: all 2nd grade math skills, or every grade at math skills.