Reflecting a 2-d shape about a line means to create a mirror image of the shape by flipping it over the line. This results in the shape appearing identical on both sides of the line.
The line of reflection is determined by finding the perpendicular bisector of the line connecting any two corresponding points on the shape and its mirror image. This line will act as the axis of reflection.
Yes, any 2-d shape can be reflected about any line. The resulting image will be a mirror image of the original shape, but with all angles and distances preserved.
The position of the line of reflection affects the orientation and location of the reflected shape. If the line is positioned closer to the original shape, the reflected image will appear larger and closer to the original. If the line is positioned further away, the reflected image will appear smaller and further away from the original.
Reflecting a shape about a horizontal line will result in the shape being flipped upside down, while reflecting about a vertical line will result in the shape being flipped from left to right. The line of reflection will also be perpendicular to the direction of the flip.