Home / Maths / Printables / Grade 5 / Regular and Irregular 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 21 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: square, equilateral triangle, regular hexagon, oblong
Regular Irregular
2. Sort each one into the right box.
Sort: scalene triangle, oblong, square, regular hexagon
Regular Irregular
3. Sort each one into the right box.
Sort: kite, scalene triangle, equilateral triangle, regular hexagon
Regular Irregular
4. Sort each one into the right box.
Sort: regular pentagon, oblong, equilateral triangle, regular hexagon
Regular Irregular
5. Sort each one into the right box.
Sort: square, regular hexagon, oblong, regular octagon
Regular Irregular
LessonPrint · 5.G.B.3 · Set 21 · free to copy for classroom use
Answer key — Regular and Irregular Set 21. Prints on its own sheet.
1. Regular: square, equilateral triangle, regular hexagon; Irregular: oblong 2. Regular: square, regular hexagon; Irregular: scalene triangle, oblong 3. Regular: equilateral triangle, regular hexagon; Irregular: kite, scalene triangle 4. Regular: regular pentagon, equilateral triangle, regular hexagon; Irregular: oblong 5. Regular: square, regular hexagon, regular octagon; Irregular: oblong Last reviewed 2026-09-05. Aligned to 5.G.B.3 of the Common Core State Standards for mathematics.