Worksheets · Geometry

Symmetry worksheet

A line of symmetry folds a figure onto itself. Rotational symmetry turns it onto itself, and the smallest turn that works is 360 degrees divided by the order.

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Free math worksheets at sigmaprep.io/worksheets© 2026 Sigma Prep

Sigma Prep · sigmaprep.io/worksheets

Name

Symmetry

Date Period

Answer each question.

  1. Find the symmetries of regular polygons

    How many lines of symmetry does an equilateral triangle have, and what is its order of rotational symmetry?
  2. How many lines of symmetry does a regular polygon with 30 sides have, and what is its order of rotational symmetry?
  3. How many lines of symmetry does a regular polygon with 30 sides have? What is its smallest angle of rotational symmetry?
  4. How many lines of symmetry does a regular hexagon have, and what is its order of rotational symmetry?
  5. How many lines of symmetry does a regular octagon have, and what is its order of rotational symmetry?
  6. How many lines of symmetry does a regular nonagon have, and what is its order of rotational symmetry?
  7. How many lines of symmetry does a square have, and what is its order of rotational symmetry?
  1. Explore the symmetry of common shapes

    How many lines of symmetry does an ellipse that is not a circle have, and what is its order of rotational symmetry?
  2. How many lines of symmetry does a kite that is not a rhombus have, and what is its order of rotational symmetry?
  3. How many lines of symmetry does a rhombus that is not a square have?
  4. Does a regular five-pointed star have rotational symmetry? If so, what is its smallest angle?
  5. How many lines of symmetry does a regular eight-pointed star have, and what is its order of rotational symmetry?
  6. Does a regular eight-pointed star have rotational symmetry? If so, what is its smallest angle?
  7. How many lines of symmetry does an isosceles trapezoid have, and what is its order of rotational symmetry?
  1. Use the order of rotational symmetry

    The smallest angle that turns a figure onto itself is 5 degrees. What is its order of rotational symmetry?
  2. Does a regular polygon with 15 sides match itself after a rotation of 60 degrees?
  3. Does a regular dodecagon match itself after a rotation of 290 degrees?
  4. Does a regular nonagon match itself after a rotation of 200 degrees?
  5. Does an equilateral triangle match itself after a rotation of 150 degrees?
  6. Does a regular polygon with 18 sides match itself after a rotation of 40 degrees?

Free math worksheets at sigmaprep.io/worksheets© 2026 Sigma Prep

Sigma Prep · sigmaprep.io/worksheets

Name

SymmetryAnswer keyVersion 1

Date Period

Answer each question.

  1. Find the symmetries of regular polygons

    How many lines of symmetry does an equilateral triangle have, and what is its order of rotational symmetry?3 lines; order 3
  2. How many lines of symmetry does a regular polygon with 30 sides have, and what is its order of rotational symmetry?30 lines; order 30
  3. How many lines of symmetry does a regular polygon with 30 sides have? What is its smallest angle of rotational symmetry?30 lines; 12∘
  4. How many lines of symmetry does a regular hexagon have, and what is its order of rotational symmetry?6 lines; order 6
  5. How many lines of symmetry does a regular octagon have, and what is its order of rotational symmetry?8 lines; order 8
  6. How many lines of symmetry does a regular nonagon have, and what is its order of rotational symmetry?9 lines; order 9
  7. How many lines of symmetry does a square have, and what is its order of rotational symmetry?4 lines; order 4
  1. Explore the symmetry of common shapes

    How many lines of symmetry does an ellipse that is not a circle have, and what is its order of rotational symmetry?2 lines; order 2
  2. How many lines of symmetry does a kite that is not a rhombus have, and what is its order of rotational symmetry?1 line; order 1
  3. How many lines of symmetry does a rhombus that is not a square have?2 lines
  4. Does a regular five-pointed star have rotational symmetry? If so, what is its smallest angle?Yes, 72∘
  5. How many lines of symmetry does a regular eight-pointed star have, and what is its order of rotational symmetry?8 lines; order 8
  6. Does a regular eight-pointed star have rotational symmetry? If so, what is its smallest angle?Yes, 45∘
  7. How many lines of symmetry does an isosceles trapezoid have, and what is its order of rotational symmetry?1 line; order 1
  1. Use the order of rotational symmetry

    The smallest angle that turns a figure onto itself is 5 degrees. What is its order of rotational symmetry?72
  2. Does a regular polygon with 15 sides match itself after a rotation of 60 degrees?No: 60 is not a multiple of 24
  3. Does a regular dodecagon match itself after a rotation of 290 degrees?No: 290 is not a multiple of 30
  4. Does a regular nonagon match itself after a rotation of 200 degrees?Yes: 200=5×40
  5. Does an equilateral triangle match itself after a rotation of 150 degrees?No: 150 is not a multiple of 120
  6. Does a regular polygon with 18 sides match itself after a rotation of 40 degrees?Yes: 40=2×20

Free math worksheets at sigmaprep.io/worksheets© 2026 Sigma Prep

How to do these

How many lines of symmetry does a regular hexagon have? What is its smallest angle of rotational symmetry?

  1. A regular polygon has one line of symmetry for each side.
  2. It turns onto itself every 360 divided by 6 degrees.

The answer is 6 lines; 60∘.

Where students go wrong

Counting four lines of symmetry for a rectangle. Its diagonals are not lines of symmetry unless it is a square.

Also called line symmetry, rotational symmetry, reflectional symmetry or order of rotational symmetry.

What you can put on this worksheet

Regular polygons
What is the smallest angle of rotational symmetry of a regular octagon? → 45∘
Triangles, quadrilaterals and circles
How many lines of symmetry does a scalene triangle have? → 0 lines
Order of rotational symmetry
In one full turn, how many times does a regular octagon land exactly on itself? → 8

Questions about these worksheets

Yes. Every symmetry sheet is free to print and free to download as a PDF. There is no account to make, no email to hand over and no limit on how many you take.

Yes. The answer key prints on a second page, and you can choose whether it shows each question beside its answer or just the answers in a list.

Yes. Print straight from the page, or download the PDF and print that. The sheet is laid out for paper rather than squeezed off a screen, so there is room to work under each question, and the answer key comes out on its own page.

Geometry is usually taken around 9th or 10th grade, though schools vary and plenty of students meet it earlier or later. Pick the difficulty rather than the grade: the easy level suits a first lesson on it, the hard level suits review before a test.

Yes, as many as you like. The questions are built fresh each time rather than picked from a fixed set of files, so pressing Generate gives a new sheet. That is what you want for a second class, a retake, or two students sitting next to each other.

That is the closest comparison, and Kuta Software is good software. It is also paid software you install on a computer. These worksheets run in a browser tab for free, with no account and nothing to install. Like Kuta, the symmetry questions are generated when you ask for them rather than pulled from a fixed set of files, so two classes never get the same sheet, and the answer key comes with it.

Yes. There are three levels, and you can tick more than one for a sheet that mixes them, in which case the questions come out easiest first. The harder levels are not just larger numbers: they ask for something the easy ones do not.

You pick from 3: regular polygons, triangles, quadrilaterals and circles and order of rotational symmetry. Tick as many as you want and set how many of each, or let it spread them evenly.

Counting four lines of symmetry for a rectangle. Its diagonals are not lines of symmetry unless it is a square.