Practice solving real-life standard perimeter and missing side length word problems with this worksheet.
How do you find the perimeter of an object? When calculating the perimeter, you determine the distance around the outside of a 2D shape. This can be done by adding up all the sides, or using a formula in some cases. When determining the perimeter of a rectangle, the formula P=2l + 2w can be used (L representing the length and w representing the width). But what about cases where you don’t know the length of all of the sides? These problems involve multiple operations, such as adding the known side lengths together, subtracting the number from the perimeter, and then dividing by 2. If your students have practiced these types of problems in isolation, then this math worksheet will be a great assessment tool to ensure they can solve various perimeter word problems.
With this worksheet, students will have the opportunity to practice solving 8 questions that involve standard perimeter problems and unknown side problems. Questions may include those such as:
The donut shop is 12 meters by 6 meters, and the owner wants to purchase new LED light strips to line the top of each wall. How many meters of LEDs does he need to purchase to border the entire shop?
The length of the soccer field is 60 feet and has a perimeter of 200 feet. What is the width of the soccer field?
An answer key is included with your download to make grading fast and easy!
Tips for Differentiation + Scaffolding
In addition to independent student work time, use this worksheet as an activity for:
- Guided math groups
- Lesson wrap-up
- Fast finishers
- Homework assignment
- Whole-class review (via smartboard)
For students who need a bit of a challenge, consider assigning the alternate version of this resource:
If there are students who need support, consider completing this worksheet in a 1-on-1 setting or in a small group setting. Additionally, work with students to draw a picture to solve each problem. There also are alternate versions of this resource where students can practice standard perimeter problems as well as unknown side perimeter problems.
🖨️ Easily Download & Print
Use the dropdown icon on the Download button to choose between the PDF or editable Google Slides version of this resource.
Because this resource includes an answer sheet, we recommend you print one copy of the entire file. Then, make photocopies of the blank worksheet for students to complete.
To save paper, we suggest printing this 2-page worksheet double-sided.
Turn this teaching resource into a sustainable activity by printing on cardstock and slipping it into a dry-erase sleeve. Students can record their answers with a whiteboard marker, then erase and reuse them.
Additionally, project the worksheet onto a screen and work through it as a class by having students record their answers in their notebooks.
This resource was created by Nicole Ellis, a teacher in New York and Teach Starter Collaborator.
Don’t stop there! We’ve got more activities to shorten your lesson planning time:
Use this poster to teach your students how to find the perimeter of a rectangle.
Draw matching figures when given the perimeter of rectangles and squares.
Calculate and match the perimeters of all 16 shapes on the board to reveal a perimeter puzzle mystery picture.