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 20 of 25 · the same problems every time you open this link.
Download PDF
Next set One paper per student
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: regular pentagon, rectangle that is not a square, regular octagon, kite
Regular Irregular
2. Sort each one into the right box.
Sort: equilateral triangle, square, rhombus that is not a square, regular hexagon
Regular Irregular
3. Sort each one into the right box.
Sort: scalene triangle, rhombus that is not a square, regular octagon, rectangle that is not a square
Regular Irregular
4. Sort each one into the right box.
Sort: equilateral triangle, scalene triangle, rectangle that is not a square, regular hexagon
Regular Irregular
5. Sort each one into the right box.
Sort: scalene triangle, kite, regular hexagon, rectangle that is not a square
Regular Irregular
LessonPrint · 5.G.B.3 · Set 20 · free to copy for classroom use
Answer key — Regular and Irregular Set 20. Prints on its own sheet.
1. Regular: regular pentagon, regular octagon; Irregular: rectangle that is not a square, kite 2. Regular: equilateral triangle, square, regular hexagon; Irregular: rhombus that is not a square 3. Regular: regular octagon; Irregular: scalene triangle, rhombus that is not a square, rectangle that is not a square 4. Regular: equilateral triangle, regular hexagon; Irregular: scalene triangle, rectangle that is not a square 5. Regular: regular hexagon; Irregular: scalene triangle, kite, rectangle that is not a square Last reviewed 2026-09-05. Aligned to 5.G.B.3 of the Common Core State Standards for Mathematics.