Question

The line segment shown is rotated 90° about the origin (counterclockwise). What are the new coordinates of point A? A) (2, 1) B) (-2, 1) C) (-2, -1) D) (1, 2)

Answer 1

Answer:

A. (2,1)

Step-by-step explanation:

Answer 2

Under a counterclockwise rotation about the origin of 90°

a point (x , y ) → (- y, x ), hence

A(2, 1 ) → A'(- 1, 2 )