How Many Lines of Symmetry? is a free printable Grade 4 maths worksheet on linking a regular polygon’s sides to its lines of symmetry, aligned to Common Core standard 4.G.A.3. It prints 6 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 6 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.

How Many Lines of Symmetry?

4.G.A.3

NameDate

Answer each question.

1.A regular polygon with 3 sides has how many lines of symmetry?

2.A regular polygon with 11 sides has how many lines of symmetry?

3.A regular polygon with 12 sides has how many lines of symmetry?

4.A regular polygon with 8 sides has how many lines of symmetry?

5.A regular polygon with 4 sides has how many lines of symmetry?

6.A regular polygon with 9 sides has how many lines of symmetry?

LessonPrint · 4.G.A.3 · Set 6 · free to copy for classroom use

Answer key — How Many Lines of Symmetry?

Set 6. Prints on its own sheet.

1.3
2.11
3.12
4.8
5.4
6.9

Last reviewed 2026-09-05. Aligned to 4.G.A.3 of the Common Core State Standards for mathematics.