Question

Which ordered pair gives the coordinates of the image of R(-a, b) if R is rotated clockwise 180°?

(- b, - a)
( b, - a)
( a, - b)
( a, b)

Answer 1

rotating 180 degrees clockwise is just adding a negative sign to the coordinate
(x,y) -> (-x,-y)

(-a,b) -> (-(-a),-b)

and -(-a) is just a

So contrary to what extrinix believes, it would be (a,-b)

Answer 2

tysm! :)

Answer 3

yw~