Perimeter Worksheets
Master perimeter worksheets with unlimited practice problems. Customize difficulty and generate fresh worksheets every time.
Add the Edges
Perimeter is the distance AROUND a shape. Just add up all the side lengths.
Linear Units
Use linear units (cm, m, in) for perimeter. Unlike area, it is not squared!
Rectangle Shortcut
For rectangles, just add the length and width, then multiply by 2.
Worksheet Facts by Grade Level
| Shape | Formula | Why it works |
|---|---|---|
| Rectangle | 2(L + W) | Two lengths + two widths |
| Square | 4S | Four equal sides added together |
| Triangle | A + B + C | The sum of all three outer edges |
| Any Polygon | Sum of all sides | The total distance of the boundary |
Mastering Perimeter Calculations
Perimeter is the total length of the boundary of a closed 2D shape. Our free printable perimeter worksheets cover everything from basic squares to complex polygons.
Perimeter Formulas
- Square: 4 × Side
- Rectangle: 2 × (Length + Width)
- Triangle: Side A + Side B + Side C
- Circle (Circumferance): 2 × π × Radius
Example: Rectangle (8cm × 5cm)
(8 + 5) × 2 = 26 cm.
Benefits of Mastery
🏃 Physical Logic
Helps students visualize "walking the perimeter" to understand distance.
📏 Measurement Fluency
Improves accuracy in using rulers and standard units of measure.
🏠 real-World Prep
Essential for tasks like buying fencing, framing pictures, or installing baseboards.
📐 Geometry Discovery
The first step in understanding the relationship between shape and size.
Frequently Asked Questions
What is the "circumference"?
Circumference is just a fancy name for the perimeter of a circle!
Can two different shapes have the same perimeter?
Yes. For example, a square with 4cm sides (P=16) and a rectangle with 6cm and 2cm sides (P=16) have the same perimeter but different areas.