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Count sides and corners: 2nd grade math

Shapes by number of sides and angles; partition rectangles into rows and columns. A free 2nd grade lesson plan, a question set with answers and a printable sheet with its key. Copy it and make it yours.

Lesson plan

Goal

  • Students can do this: shapes by number of sides and angles; partition rectangles into rows and columns.

Teach (10 min)

  • Triangle 3, quadrilateral 4, pentagon 5, hexagon 6.
  • A polygon has the same number of angles as sides.
  • Work one example on the board while students say each step aloud, then do one together.

Practise (15 min)

  • Students work the printable sheet in pairs, then alone.
  • Or practise it as a game with no sign-up: https://peabody.kids/math/geom.polygon?lesson=2-geom-polygon-1&at=2

Exit ticket (5 min)

  • Use the first three questions on the printable sheet as a slip.

Printable sheet

Name: ____________________   Date: ____________

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.
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

Written by Peabody from its own skill pages. Free, no ads, no sign-in. Children can practise this on Peabody. More from teachers: teacher-shared resources.