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Regular and Irregular is a free printable Grade 5 math 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 students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 6 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. 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: equilateral triangle, square, kite, regular octagon

RegularIrregular
2.Sort each one into the right box.

Sort: scalene triangle, rectangle that is not a square, square, regular octagon

RegularIrregular
3.Sort each one into the right box.

Sort: equilateral triangle, rectangle that is not a square, regular hexagon, rhombus that is not a square

RegularIrregular
4.Sort each one into the right box.

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

RegularIrregular
5.Sort each one into the right box.

Sort: regular pentagon, regular hexagon, kite, regular octagon

RegularIrregular

LessonPrint · 5.G.B.3 · Set 6 · free to copy for classroom use

Answer key — Regular and Irregular

Set 6. Prints on its own sheet.

  1. 1.Regular: equilateral triangle, square, regular octagon; Irregular: kite
  2. 2.Regular: square, regular octagon; Irregular: scalene triangle, rectangle that is not a square
  3. 3.Regular: equilateral triangle, regular hexagon; Irregular: rectangle that is not a square, rhombus that is not a square
  4. 4.Regular: regular octagon, regular hexagon, regular pentagon, equilateral triangle; Irregular: —
  5. 5.Regular: regular pentagon, regular hexagon, regular octagon; Irregular: kite

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