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

Does a circle have a line of symmetry?

Back

Yes, a circle has an infinite number of lines of symmetry.

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 a rectangle have?

Back

A rectangle has 2 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 shape has only one line of symmetry?

Back

A kite has only one line of symmetry.

Front

Can a shape have no lines of symmetry? Give an example.

Back

Yes, a shape can have no lines of symmetry. An example is a scalene triangle.

Front

What is the relationship between lines of symmetry and congruence?

Back

Shapes divided by a line of symmetry are congruent on either side of the line.

Front

How do you find a line of symmetry in a shape?

Back

To find a line of symmetry, fold the shape along a line and see if both halves match perfectly.

Front

What is the line of symmetry for a vertical rectangle?

Back

The vertical line through the center of the rectangle is its line of symmetry.