Question

question 7 of 10 abcd is rotated counterclockwise about the origin. by how many degrees was abcd rotated? a. 270° b. 360° c. 90° d. 180°

Explanation:

Step1: Observe the rotation

We can see that point A moves from the positive - x - axis to the positive - y - axis.

Step2: Recall rotation rules

A counter - clockwise rotation of 90° about the origin moves a point (x,y) to (-y,x).

Answer:

C. 90°