Question

If the following figure is rotated 90° counterclockwise about the origin, the new location is E’ (-6, 2), F’ (4, 7), G’ (7, -2), H’ (-1, -5).

True

False

Answer 1

True

Explanation:

Under a counterclockwise rotation about the origin of 90°

a point (x , y ) → (- y, x ), thus

E(2, 6 ) → E'(- 6, 2 )

F(7, - 4 ) → F'( 4, 7 )

G(- 2, - 7 ) → G'(7, - 2 )

H(- 5, 1 ) → H'(- 1, - 5 )