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More Lessons for Grade 9 Math

Math Worksheets

Examples, solutions, videos, worksheets, games and activities to help Geometry students learn about line symmetry and plane symmetry.

The following diagram shows the line of symmetry for quadrilaterals and triangles. Scroll down the page for more examples and solutions on lines of symmetry.

**Reflection Symmetry (or Line Symmetry) and Rotational Symmetry**

Symmetry in a figure exists if there is a reflection, rotation, or translation that can be performed and the image is identical. Reflectional symmetry exists when the figure can be folded over onto itself along a line. This line is called the "line of symmetry". In regular polygons, the number of lines of symmetry equals the number of sides in the polygon.

**Line Symmetry and Rotational Symmetry**

Learn to identify lines of symmetry and rotational symmetry**Plane Symmetry**

Plane symmetry is analogous to line symmetry, except that it is in three dimensions. The three dimensional figure is divided into two halves by a plane.

**Plane symmetry and axis symmetry**

Examples of plane symmetry and axis symmetry

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

More Lessons for Grade 9 Math

Math Worksheets

Examples, solutions, videos, worksheets, games and activities to help Geometry students learn about line symmetry and plane symmetry.

The following diagram shows the line of symmetry for quadrilaterals and triangles. Scroll down the page for more examples and solutions on lines of symmetry.

Symmetry in a figure exists if there is a reflection, rotation, or translation that can be performed and the image is identical. Reflectional symmetry exists when the figure can be folded over onto itself along a line. This line is called the "line of symmetry". In regular polygons, the number of lines of symmetry equals the number of sides in the polygon.

Learn to identify lines of symmetry and rotational symmetry

Plane symmetry is analogous to line symmetry, except that it is in three dimensions. The three dimensional figure is divided into two halves by a plane.

The following diagram shows a plane symmetry of a cuboid.

Examples of plane symmetry and axis symmetry

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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