Sort by Number of Sides is a free printable Grade 3 maths worksheet on grouping shapes by a shared attribute, aligned to Common Core standard 3.G.A.1. 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 23 of 25 · the same problems every time you open this link.

One paper per pupil

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Sort by Number of Sides

3.G.A.1

NameDate

Sort each one into the right box.

1.Sort each one into the right box.

Sort: pentagon, heptagon, rectangle, trapezoid

4 sidesMore than 4 sides

2.Sort each one into the right box.

Sort: oblong, hexagon, trapezoid, kite

4 sidesMore than 4 sides

3.Sort each one into the right box.

Sort: oblong, hexagon, heptagon, pentagon

4 sidesMore than 4 sides

4.Sort each one into the right box.

Sort: octagon, pentagon, rectangle, oblong

4 sidesMore than 4 sides

5.Sort each one into the right box.

Sort: heptagon, oblong, kite, pentagon

4 sidesMore than 4 sides

LessonPrint · 3.G.A.1 · Set 23 · free to copy for classroom use

Answer key — Sort by Number of Sides

Set 23. Prints on its own sheet.

1.4 sides: rectangle, trapezoid; More than 4 sides: pentagon, heptagon
2.4 sides: oblong, trapezoid, kite; More than 4 sides: hexagon
3.4 sides: oblong; More than 4 sides: hexagon, heptagon, pentagon
4.4 sides: rectangle, oblong; More than 4 sides: octagon, pentagon
5.4 sides: oblong, kite; More than 4 sides: heptagon, pentagon

More practice for 3.G.A.1

Group shapes by what they have in common.

Teaching this next? Sorting Shapes by Shared Attributes is the 45-minute plan for it, with the misconceptions to expect.

All Grade 3 worksheets

Last reviewed 2026-09-05. Aligned to 3.G.A.1 of the Common Core State Standards for mathematics.