Exploring Lines of Symmetry

What is a line of symmetry?

• A line that connects two opposite corners of a shape.

• A line that represents the perimeter of a shape.

• A line that indicates the direction of movement in a shape.

• A line that divides a shape into two identical mirror-image halves.

Tags

CCSS.4.G.A.3

How many lines of symmetry does a square have?

• 4

• 6

• 2

• 8

Tags

CCSS.4.G.A.3

Draw a line of symmetry on a rectangle.

• Draw a vertical line or a horizontal line through the center of the rectangle.

• Draw a diagonal line from corner to corner.

• Draw a wavy line across the rectangle.

• Draw a line outside the rectangle.

Tags

CCSS.4.G.A.3

Which shape has no lines of symmetry: circle, triangle, or rectangle?

• oval

• square

• pentagon

• triangle

Tags

CCSS.4.G.A.3

Identify the number of lines of symmetry in an equilateral triangle.

• 2

• 3

• 1

• 4

Tags

CCSS.4.G.A.3

Explain why a butterfly is symmetrical.

• A butterfly is symmetrical due to its colorful patterns.

• A butterfly is symmetrical because it has four wings.

• A butterfly is symmetrical because it flies in a straight line.

• A butterfly is symmetrical because its left and right sides are mirror images of each other.

Draw a line of symmetry on a regular pentagon.

• Draw a line through the center of the pentagon.

• Draw a line from a vertex to the midpoint of the opposite side.

• Draw a line from one vertex to another vertex.

• Draw a line parallel to one of the sides.

Tags

CCSS.4.G.A.3

Classify the following shapes as symmetrical or not: star, oval, trapezoid.

• Star: Symmetrical

• Star: Not symmetrical, Oval: Symmetrical, Trapezoid: Not necessarily symmetrical (depends on type)

• Oval: Not symmetrical

• Trapezoid: Always symmetrical

Tags

CCSS.4.G.A.3

How many lines of symmetry does a circle have?

• 3

• infinite

• 1

• 2

Tags

CCSS.4.G.A.3

Identify a shape that has exactly one line of symmetry.

• Circle

• Kite

• Triangle

• Rectangle

Tags

CCSS.4.G.A.3