Question

Pentagon ABCDE is shown on the coordinate plane below.



If pentagon ABCDE is rotated 180° around the origin to create pentagon A’B’C’D’E’, what is the ordered pair of point D’?
Answer
(2, 1)
(-1, 2)
(1, -2)
(-2, -1)

Answer 1

for 180 any rotation, just multiply both coordinates by -
that would be = -(1, -2) = (-1, 2)

Answer 2

so the awnser is

Answer 3

B?

Answer 4

yep ... do 180 rotation onwards this way ... clockwise or counter clockwise. doesn't matter