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.

Tags

CCSS.4.G.A.3

Front

How many lines of symmetry does a circle have?

Back

A circle has an infinite number of lines of symmetry.

Tags

CCSS.4.G.A.3

Front

What is the line of symmetry for a rectangle?

Back

A rectangle has two lines of symmetry: one vertical and one horizontal.

Tags

CCSS.4.G.A.3

Front

How many lines of symmetry does a square have?

Back

A square has four lines of symmetry.

Tags

CCSS.4.G.A.3

Front

What is the line of symmetry for an equilateral triangle?

Back

An equilateral triangle has three lines of symmetry.

Tags

CCSS.4.G.A.3

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 trapezoid.

Tags

CCSS.4.G.A.3

Front

What is the relationship between lines of symmetry and congruence?

Back

Lines of symmetry indicate that the two halves of a shape are congruent.

Tags

CCSS.4.G.A.3

Front

How do you determine the number of lines of symmetry in a polygon?

Back

To determine the number of lines of symmetry in a polygon, look for lines that can divide the shape into two identical halves.

Tags

CCSS.4.G.A.3

Front

Is a line of symmetry always vertical or horizontal?

Back

No, a line of symmetry can be at any angle, not just vertical or horizontal.

Tags

CCSS.4.G.A.3

Front

What is the line of symmetry for a regular pentagon?

Back

A regular pentagon has five lines of symmetry.

Tags

CCSS.4.G.A.3