The point is its own image if the point is __
Any point that remains unaltered under a given transformation is called an invariant.
The point is its own image if the point is an invariant point.
If the point is its own image then that point is an invariant point.
A point P is its own image under the reflection in a line l. Describe the position of the point P with respect to the line l.
If the image of a point P is P itself, then P is an ___ point.