To perform a 180-degree rotation clockwise about the origin, you can use the rule that for any point \((x, y)\), the new coordinates after a 180-degree rotation will be \((-x, -y)\).
Given the point \((1, 2)\):
- The new coordinates after the rotation will be: \[ (-1, -2) \]
So, the new point after the 180-degree rotation of \((1, 2)\) about the origin is \((-1, -2)\).