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Perimeter of a Rectangle is a free printable Grade 3 maths worksheet on the distance around a figure, aligned to Common Core standard 3.MD.D.8. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 1 of 25 · the same problems every time you open this link.

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One paper per pupil

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All 25 sets ask different questions.

Perimeter of a Rectangle

3.MD.D.8

NameDate

Work out the perimeter.

1.
Sides 9 and 12. Perimeter =
2.
Sides 9 and 10. Perimeter =
3.
Sides 9 and 11. Perimeter =
4.
Sides 8 and 11. Perimeter =
5.
Sides 7 and 11. Perimeter =
6.
Sides 6 and 11. Perimeter =
7.
Sides 8 and 14. Perimeter =
8.
Sides 6 and 14. Perimeter =

LessonPrint · 3.MD.D.8 · Set 1 · free to copy for classroom use

Answer key — Perimeter of a Rectangle

Set 1. Prints on its own sheet.

  1. 1.42 units
  2. 2.38 units
  3. 3.40 units
  4. 4.38 units
  5. 5.36 units
  6. 6.34 units
  7. 7.44 units
  8. 8.40 units

Questions about Perimeter of a Rectangle

What does the Perimeter of a Rectangle worksheet cover?

It practises the distance around a figure — 8 questions for Grade 3, all on Common Core 3.MD.D.8: Find the distance around a shape. The instruction to pupils is “Work out the perimeter”, and the answer key follows on the next sheet.

Which Common Core standard does Perimeter of a Rectangle practise?

CCSS.MATH.CONTENT.3.MD.D.8 — 3.MD.D.8, in the Measurement & Data domain for Grade 3. The published standard reads: “Solve real world and mathematical problems involving perimeters of polygons.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Perimeter of a Rectangle is written for Grade 3, typically ages 8-9. It is one of the sheets on 3.MD.D.8, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.

Does Perimeter of a Rectangle come with an answer key?

Yes. All 8 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.

How many different versions of Perimeter of a Rectangle can I print?

25 — one per pupil, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.

Is Perimeter of a Rectangle free to print and photocopy?

Yes. Perimeter of a Rectangle, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.

Is there a lesson plan to teach 3.MD.D.8?

Yes — “Perimeter of Polygons” is a 45-minute Grade 3 plan for 3.MD.D.8, timed section by section, with the misconceptions to expect and an exit ticket. Perimeter of a Rectangle is the practice that follows it.

More practice for 3.MD.D.8

Find the distance around a shape.

Teaching this next? Perimeter of Polygons is the 45-minute plan for it, with the misconceptions to expect.

All Grade 3 worksheets

Last reviewed 2026-09-05. Aligned to 3.MD.D.8 of the Common Core State Standards for mathematics.