Regular Polygons and Lines of Symmetry

Front

What is a regular polygon?

Back

A regular polygon is a polygon with all sides and all angles equal.

Front

How many lines of symmetry does a square have?

Back

A square has 4 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 many lines of symmetry does a regular pentagon have?

Back

A regular pentagon has 5 lines of symmetry.

Front

Can a polygon have no lines of symmetry?

Back

Yes, some irregular polygons can have no 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 relationship between regular polygons and their lines of symmetry?

Back

Regular polygons have as many lines of symmetry as they have sides.

Front

What is an example of a polygon with exactly one line of symmetry?

Back

A rectangle has exactly one line of symmetry when it is not a square.

Front

How can you determine if a shape has a line of symmetry?

Back

You can fold the shape along a line; if the two halves match perfectly, it has a line of symmetry.

Front

What is the line of symmetry for a circle?

Back

A circle has an infinite number of lines of symmetry.