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 15 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, regular octagon, square, oblong
Regular Irregular
2. Sort each one into the right box.
Sort: equilateral triangle, kite, scalene triangle, regular octagon
Regular Irregular
3. Sort each one into the right box.
Sort: regular pentagon, equilateral triangle, scalene triangle, regular octagon
Regular Irregular
4. Sort each one into the right box.
Sort: square, oblong, regular octagon, kite
Regular Irregular
5. Sort each one into the right box.
Sort: regular hexagon, kite, equilateral triangle, square
Regular Irregular
LessonPrint · 5.G.B.3 · Set 15 · free to copy for classroom use
Answer key — Regular and Irregular Set 15. Prints on its own sheet.
1. Regular: regular octagon, square; Irregular: scalene triangle, oblong 2. Regular: equilateral triangle, regular octagon; Irregular: kite, scalene triangle 3. Regular: regular pentagon, equilateral triangle, regular octagon; Irregular: scalene triangle 4. Regular: square, regular octagon; Irregular: oblong, kite 5. Regular: regular hexagon, equilateral triangle, square; Irregular: kite Last reviewed 2026-09-05. Aligned to 5.G.B.3 of the Common Core State Standards for mathematics.