Question

quadrilateral efgh is rotated 180° counterclockwise about the origin to form quadrilateral efgh. write the rule for the rotation. (x,y)→(□,□)

Explanation:

Step1: Recall rotation rule

When a point $(x,y)$ is rotated 180° counter - clockwise about the origin, the new coordinates are obtained by changing the signs of both the $x$ and $y$ values.

Step2: Write the rule

The rule for a 180° counter - clockwise rotation about the origin is $(x,y)\to(-x,-y)$.

Answer:

$(x,y)\to(-x,-y)$