Symmetry - Line, Point, Rotational

Front

A figure has _______ symmetry when a line (or lines) divide the shape into two equal parts.

Back

Line symmetry is when a figure can be divided into two identical halves by a line.

Front

Determine the angle of rotational symmetry for the figure.

Back

The angle of rotational symmetry is the smallest angle through which a figure can be rotated to look the same. For example, a figure with 120° rotational symmetry looks the same after a rotation of 120°.

Front

How many lines of symmetry does the flower have?

Back

A flower can have multiple lines of symmetry; for example, a flower with 6 lines of symmetry can be divided into 6 identical parts.

Front

Which of the following letters does not have line symmetry, but has point symmetry: H, I, Z, X?

Back

The letter Z does not have line symmetry but has point symmetry, meaning it looks the same when rotated 180°.

Front

What is line symmetry?

Back

Line symmetry occurs when a shape can be divided into two mirror-image halves.

Front

What is point symmetry?

Back

Point symmetry means that for every point in the shape, there is another point at an equal distance from a central point, but in the opposite direction.

Front

What is rotational symmetry?

Back

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

Front

Give an example of a shape with 180° rotational symmetry.

Back

A square has 180° rotational symmetry because it looks the same when rotated halfway around.

Front

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

Back

A regular polygon has as many lines of symmetry as it has sides.

Front

What is the relationship between line symmetry and point symmetry?

Back

A shape can have both line and point symmetry, but they are different concepts; line symmetry involves dividing the shape into equal halves, while point symmetry involves a central point.