Finding the Perimeter Worksheet
This finding the perimeter worksheet gives 3rd grade students six labeled shapes plus a sandbox border problem to solve. An answer key is included, so checking work is fast and easy.
$6.97
Want this one free?
Tell us where to send it and it’s yours — no card, no catch.
One free resource per teacher. We’ll also send free teaching ideas each week — unsubscribe anytime.
Free teacher account · no credit card
Membership
Get every game, song, & printable
- Every game, on any device
- 6,600+ resources
- Assign online with HFT Classroom
Then $39.97/year · cancel anytime · See plans
- Instant digital download
- Printable PDF + answer key
- Made by real teachers
Teacher / Family membership
Teaching is easier with every resource
One membership for your whole year: 6,600+ worksheets, games, songs and videos for Preschool–6th, for your classroom or homeschool.
- Unlimited printables & downloads
- Every game, on any device
- Assign online with HFT Classroom
- Cancel anytime
Teacher / Family membership · 3 days free
Yearly
Monthly would be $119.64 a year
$3.33/month
Billed $39.97 once a year
You save $79.67 every year
Start My 3 Free Days$0 today · cancel anytime
Monthly
$9.97/month
Flexible, month to month
Yearly is just $3.33/mo. Switch and save $79.67
Start My 3 Free Days$0 today · cancel anytime
About this resource
Description
Perimeter is the distance all the way around a flat shape, and it is one of the first measurement ideas that ties geometry to real life. This Finding the Perimeter Worksheet helps third graders practice adding side lengths to measure the path around triangles, rectangles, pentagons, hexagons, parallelograms and an L-shaped figure, always writing the answer with the correct unit.
Students begin by reading a short definition and a three-part strategy chart that shows how to add all the sides, how to use 4 × side for a square, and how to add two lengths and two widths for a rectangle. In Part A they find the perimeter of six labeled shapes using inches, centimeters, feet, meters and yards. In Part B they work backward: a sandbox border is 30 feet long in all, one side is known, and students find the missing width and explain their steps. Use the page for independent practice, a math center, homework or a quick check after a lesson.
What’s Included
- One printable finding the perimeter worksheet with six labeled polygons
- A strategy chart for any shape, squares and rectangles
- A missing side length word problem with a written explanation
- A complete answer key
Why This Worksheet Helps Kids
First, every shape shows all of its side lengths, so students build the habit of adding every side exactly once instead of guessing. Second, mixing units reminds children that a perimeter is a length and always needs a unit. Third, the sandbox problem asks students to think in reverse, which builds the reasoning they need for multi-step measurement problems on state tests.
Ideas for Teachers and Parents
Before handing out this 3rd grade perimeter worksheet, have students walk the edge of a rug or table and count their steps to feel what perimeter means. Encourage them to tick off each side with a pencil as they add it. At home, measure a picture frame, a garden bed or a sandbox with a tape measure and find its perimeter together. For an extra challenge, ask students to draw two different rectangles that both have a perimeter of 24 units.
Related Resources
What teachers say
Reviews
Write a review, earn store credit
Get 25¢ in credit for every approved review of a resource you’ve downloaded, played or purchased — up to 15 a month. Credit applies automatically to your membership payments, so your reviews can help pay for your membership.
Honest reviews only — any star rating earns the same. Program rules
Log in to write a review and earn store credit.
This 3rd grade Finding the Area of Grid Shapes Worksheet has students count unit squares to find the area of rectangles and L-shapes. Answer key included.
A 3rd grade finding shape perimeter worksheet where students add the side lengths of rectangles, squares, and triangles to find each shape’s perimeter. Includes a complete answer key for quick, no-prep geometry practice.
This Finding the Area by Multiplying Worksheet gives 3rd graders six labeled rectangles on a unit grid to practice finding area by multiplying length by width. An answer key is included for easy, no-prep geometry practice.
A Finding Different Shapes Area Worksheet where 3rd graders find the area of rectangles, squares, and composite shapes in square units. Answer key included—great for no-prep area practice.
A count-the-squares finding area of irregular shapes worksheet that helps 3rd graders measure area by counting unit squares on six grid figures. Answer key included, perfect for no-prep area practice at home or school.
Using the Shapes Song, students learn all about shapes, including Shape Names and Shape Recognition. The Shapes Song by Have Fun Teaching is a song that teaches the shapes. Shapes have names their made of angles and lines, there are flat shapes and solid shapes we see them all the…
A Florida FAST 3rd grade math practice test workbook for teachers, with a pretest, skill practice for all 34 benchmarks, mixed review and 2 full-length practice tests. Answer key included, so test prep is ready to go.
This Finding the Area in Square Units Worksheet lets 3rd graders count same-size squares inside six shapes to measure area. Includes a complete answer key—great for hands-on, no-prep geometry practice at home or school.
Using the Square Song (MP3), students learn all about squares, including Shape Names and Shape Recognition through a catchy song!
This Area in Square Units Worksheet gives 3rd graders six grid figures to count, two garden word problems, and a write-about-it prompt. An answer key is included, so checking student work takes seconds.
This Rectangles Area Worksheet helps 3rd graders find area by counting unit squares and by multiplying side lengths, then apply the skill to two word problems. An answer key is included, so practice is ready in a single print.
A Solving Perimeter Word Problems Worksheet that gives 3rd graders five real-world problems, including one missing-side challenge with a written explanation. Answer key included for fast, no-prep perimeter practice.
Reviews
There are no reviews yet