Home / Math / Printables / Grade 5 / Regular and Irregular 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 25 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
Name Date
Sort each one into the right box.
1. Sort each one into the right box.
Sort: scalene triangle, rhombus that is not a square, regular pentagon, regular octagon
Regular Irregular
2. Sort each one into the right box.
Sort: regular hexagon, rhombus that is not a square, scalene triangle, square
Regular Irregular
3. Sort each one into the right box.
Sort: regular octagon, regular hexagon, regular pentagon, equilateral triangle
Regular Irregular
4. Sort each one into the right box.
Sort: equilateral triangle, kite, rectangle that is not a square, regular pentagon
Regular Irregular
5. Sort each one into the right box.
Sort: square, regular octagon, regular pentagon, equilateral triangle
Regular Irregular
LessonPrint · 5.G.B.3 · Set 25 · free to copy for classroom use
Answer key — Regular and Irregular Set 25. Prints on its own sheet.
1. Regular: regular pentagon, regular octagon; Irregular: scalene triangle, rhombus that is not a square 2. Regular: regular hexagon, square; Irregular: rhombus that is not a square, scalene triangle 3. Regular: regular octagon, regular hexagon, regular pentagon, equilateral triangle; Irregular: — 4. Regular: equilateral triangle, regular pentagon; Irregular: kite, rectangle that is not a square 5. Regular: square, regular octagon, regular pentagon, equilateral triangle; Irregular: — Last reviewed 2026-09-05. Aligned to 5.G.B.3 of the Common Core State Standards for Mathematics.