Question

What are the coordinates of the point obtained if the point A=(3,7) is rotated 180 degrees about the origin?

A. (-3,7)
B. (-3,-7)
C. (-7,-3)
D. (-7,3) ​

Answer 1

B. (-3, -7)

Explanation:

Anytime you rotate a number 180° about the origin, the numbers in the coordinates become their opposites.

-3 is the opposite of 3 and -7 is the opposite of 7.

Therefore, your new coordinates are (-3, -7)

(x,y) becomes (-x,-y)