4.6B Lines of Symmetry

Front

What is symmetry?

Back

Symmetry is when one shape becomes exactly like another if you flip, slide, or turn it.

Front

What does it mean if a shape is symmetrical?

Back

A shape is symmetrical if it can be divided into two identical halves that are mirror images of each other.

Front

How many lines of symmetry does a circle have?

Back

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 a triangle have?

Back

An equilateral triangle has 3 lines of symmetry, while an isosceles triangle has 1.

Front

What is a line of symmetry?

Back

A line of symmetry is an imaginary line that divides a shape into two identical parts.

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 line of symmetry for a butterfly shape?

Back

The line of symmetry for a butterfly shape is usually down the center, dividing it into two identical wings.

Front

How can you find lines of symmetry in a shape?

Back

You can find lines of symmetry by folding the shape along a line and checking if both halves match.