Mathematics for IGCSE & O level - Transformations (Section 6 - No. 33)
If a shape is rotated 180 degrees about the origin, which of the following transformations occur?
The shape flips over the x-axis.
The shape flips over the y-axis.
The shape's position changes, but not its orientation.
The x and y coordinates switch and change sign.
Giải thích
A 180-degree rotation about the origin changes (x, y) to (-x, -y).