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Regular and Irregular is a free printable Grade 5 maths worksheet on whether all sides and angles are equal, aligned to Common Core standard 5.G.B.3. It prints 5 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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All 25 sets ask different questions.

Regular and Irregular

5.G.B.3

NameDate

Sort each one into the right box.

1.Sort each one into the right box.

Sort: oblong, regular hexagon, square, kite

RegularIrregular
2.Sort each one into the right box.

Sort: oblong, oblong, scalene triangle, equilateral triangle

RegularIrregular
3.Sort each one into the right box.

Sort: square, regular hexagon, regular pentagon, oblong

RegularIrregular
4.Sort each one into the right box.

Sort: regular pentagon, regular octagon, square, equilateral triangle

RegularIrregular
5.Sort each one into the right box.

Sort: regular pentagon, regular hexagon, oblong, regular octagon

RegularIrregular

LessonPrint · 5.G.B.3 · Set 1 · free to copy for classroom use

Answer key — Regular and Irregular

Set 1. Prints on its own sheet.

  1. 1.Regular: regular hexagon, square; Irregular: oblong, kite
  2. 2.Regular: equilateral triangle; Irregular: oblong, oblong, scalene triangle
  3. 3.Regular: square, regular hexagon, regular pentagon; Irregular: oblong
  4. 4.Regular: regular pentagon, regular octagon, square, equilateral triangle; Irregular: —
  5. 5.Regular: regular pentagon, regular hexagon, regular octagon; Irregular: oblong

Questions about Regular and Irregular

What does the Regular and Irregular worksheet cover?

It practises whether all sides and angles are equal — 5 questions for Grade 5, all on Common Core 5.G.B.3: Understand how shape categories fit inside one another. The instruction to pupils is “Sort each one into the right box”, and the answer key follows on the next sheet.

Which Common Core standard does Regular and Irregular practise?

CCSS.MATH.CONTENT.5.G.B.3 — 5.G.B.3, in the Geometry domain for Grade 5. The published standard reads: “Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Regular and Irregular is written for Grade 5, typically ages 10-11. It is one of the sheets on 5.G.B.3, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.

Does Regular and Irregular come with an answer key?

Yes. All 5 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 Regular and Irregular 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 Regular and Irregular free to print and photocopy?

Yes. Regular and Irregular, 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.

More practice for 5.G.B.3

Understand how shape categories fit inside one another.

All Grade 5 worksheets

Last reviewed 2026-09-05. Aligned to 5.G.B.3 of the Common Core State Standards for mathematics.