Perimeter and Area: Notes & Activities for 3rd and 4th Grade

Laura Wolfsen, 08/05/2025

Explore these notes and activities to learn about the difference between perimeter and area.

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  1. Perimeter and Area Notes & Formulas
    1. PERIMETER and AREA notes
  2. Perimeter Practice
    1. Use the slider to see how the perimeter of this polygon changes as the lengths of two sides change.
    2. Perimeter Play
    3. Use the shapes to answer the questions below about perimeter.
  3. Area Practice
    1. Choose your own perimeter and area adventure!
    2. Comparing Perimeters and Areas: Can two polygons have the same perimeter but different areas? Use the tools provided to change the dimensions of the square and rectangle.

1.

Perimeter and Area Notes & Formulas

Read these notes and review the formulas to learn how to find the perimeter and area of two dimensional polygons and gain clarity on the difference between these two mathematical terms.

  • 1. PERIMETER and AREA notes

1.1.

PERIMETER and AREA notes

PERIMETER and AREA notes
– Laura Wolfsen

2.

Perimeter Practice

Use these activities to better understand what perimeter is and how to find it!

  • 1. Use the slider to see how the perimeter of this polygon changes as the lengths of two sides change.
  • 2. Perimeter Play
  • 3. Use the shapes to answer the questions below about perimeter.

2.1.

Use the slider to see how the perimeter of this polygon changes as the lengths of two sides change.

Use the slider to see how the perimeter of this polygon changes as the lengths of two sides change.
– Laura Wolfsen

2.2.

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2.3.

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3.

Area Practice

Practice finding the area of objects.

  • 1. Choose your own perimeter and area adventure!
  • 2. Comparing Perimeters and Areas: Can two polygons have the same perimeter but different areas? Use the tools provided to change the dimensions of the square and rectangle.

3.1.

Choose your own perimeter and area adventure!

Drag the blue point on this quadrilateral to create different sized rectangles and squares. Watch the perimeter and areas change.
– Laura Wolfsen

3.2.

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