Answer:
(-1, -2)
Step-by-step explanation:
You want the coordinates of point (1, 2) after it has been rotated 180° about the origin.
180°
Rotation 180° about the origin is equivalent to reflection across the origin. The effect is to negate both coordinates:
(x, y) ⇒ (-x, -y) . . . . . . rotation 180°, or reflection across the origin
This means ...
(1, 2) ⇒ (-1, -2)
The new point has coordinates (-1, -2).
