Lines of Symmetry

Front

What is a line of symmetry?

Back

A line of symmetry is a line that divides a shape into two identical parts that are mirror images of each other.

Front

How can you determine if a shape is symmetrical?

Back

A shape is symmetrical if it can be divided into two identical halves that are mirror images along a line.

Front

What is the maximum number of lines of symmetry a regular polygon can have?

Back

A regular polygon can have as many lines of symmetry as it has sides.

Front

How many lines of symmetry does a square have?

Back

A square has 4 lines of symmetry.

Front

How many lines of symmetry does an equilateral triangle have?

Back

An equilateral triangle has 3 lines of symmetry.

Front

What is the line of symmetry for a rectangle?

Back

A rectangle has 2 lines of symmetry.

Front

Can a shape have no lines of symmetry?

Back

Yes, some shapes, like a scalene triangle, have no lines of symmetry.

Front

What is the relationship between lines of symmetry and rotational symmetry?

Back

Lines of symmetry are related to rotational symmetry; a shape with lines of symmetry may also have rotational symmetry, but not all shapes with rotational symmetry have lines of symmetry.

Front

How do you find the lines of symmetry in a shape?

Back

To find lines of symmetry, you can fold the shape along potential lines and see if the two halves match perfectly.

Front

What is an example of a shape with infinite lines of symmetry?

Back

A circle has an infinite number of lines of symmetry.