Question

Given point P(9,-11), what are the coordinates of P' after a 180⁰ rotation?

(9,11)
(-9,11)
(-11,-9)
(11,9)

Answer 1

(-9,11)

Explanation:

180 Degree Rotation

When rotating a point 180 degrees counterclockwise about the origin our point A(x,y) becomes A'(-x,-y). So all we do is make both x and y negative.

Answer 2

-9,11

Explanation:

The negative signs get flipped so if the number was positive it would become negative and vice versa.