4.6B Lines of Symmetry STAAR Review

Front

What is a line of symmetry?

Back

A line of symmetry is an imaginary line that divides a shape into two identical parts that are mirror images of each other.

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 circle have?

Back

A circle has an infinite number of lines of symmetry.

Front

What is the line of symmetry for a triangle?

Back

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

Front

Can a shape have no lines of symmetry?

Back

Yes, some shapes, like a scalene triangle, have no lines of symmetry.

Front

What is rotational symmetry?

Back

Rotational symmetry is when a shape can be rotated around a center point and still look the same at certain angles.

Front

Give an example of a shape with rotational symmetry.

Back

A star shape has rotational symmetry because it looks the same when rotated at certain angles.

Front

What is the difference between reflectional and rotational symmetry?

Back

Reflectional symmetry involves a mirror line, while rotational symmetry involves turning the shape around a point.

Front

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

Back

To find the line of symmetry, fold the shape in half to see if both sides match perfectly.