Rotating a point \((x, y)\) 180 degrees clockwise about the origin results in moving the point to \((-x, -y)\).
Given the point \((1, 2)\):
- The new x-coordinate is \(-1\) (which is \(-1\) times the original x-coordinate).
- The new y-coordinate is \(-2\) (which is \(-1\) times the original y-coordinate).
So, after rotating the point \((1, 2)\) 180 degrees clockwise about the origin, the new point will be:
\[ (-1, -2) \]