Question

Question 4 of 25

How many degrees has AABC been rotated counterclockwise about theOrigin?
OA. 90°
OB. 180°
OC. 270

Answer 1

A.90 degrees.

Explanation:

The rotation rule for a 90 degree counterclockwise rotation is (x,y)->(-y,x)

In triangle A'B'C', the sign in front of the x coordinate stayed the same, but the sign in front of the y coordinate changed to a negative. The order of the x and y coordinates also changed.