You turn it a quarter to see if it still has a line of symmetry.
yes
The rectangle's rotational symmetry is of order 2. A square's rotational symmetry is of order 4; the triangle has a symmetry of order 3. Rotational symmetry is the number of times a figure can be rotated and still look the same as the original figure.
A circle and square.
a circle or a sphere
Line
A figure has rotational symmetry if you can turn it about a figure.
A sphere has rotational symmetry of an infinite degree.
yes
yes
The rectangle's rotational symmetry is of order 2. A square's rotational symmetry is of order 4; the triangle has a symmetry of order 3. Rotational symmetry is the number of times a figure can be rotated and still look the same as the original figure.
Yes. An ellipse (oval) has two lines of symmetry, but not a rotational symmetry. A parabola has one line and no rotation.
A circle and square.
a circle or a sphere
z
a right triangle
Yes. A circle has infinitely many lines of symmetry and it also has rotational symmetry of infinite order.
Same length, same width, same size, same shape