1. A figure in the plane has this if the figure can be mapped onto itself by a rotation of 180 degrees or less. What is it?

Question

2. A type of composite or combination transformation of a reflection over a line followed by a translation or vice versa. What is it?

3. the operation that maps, or moves, a preimage onto an image. What is it?

4. A line that a figure in the plane has if the figure can be mapped onto itself by a reflection in the line. What is it?

5. Also known as the angle of rotation; the measure of degrees that a figure is rotated about a fixed point. What is it?

Answer 1

1. The property of a figure in the plane that can be mapped onto itself by a rotation of 180 degrees or less is called point symmetry or central symmetry.

2. The type of composite or combination transformation described is called a glide reflection.

3. The operation that maps, or moves, a preimage onto an image is known as a transformation.

4. The line that a figure in the plane has if the figure can be mapped onto itself by a reflection in the line is called the line of symmetry.

5. The measure of degrees that a figure is rotated about a fixed point is known as the angle of rotation.