The vertices of a figure are A(1,-1), B(5,-6), and C(1,-6). Rotate the figure 90° counterclockwise about the origin. Find the coordinates of the image.

Answer 1

The rule for a 90 degree CCW rotation is:

_{R 90°CCW}

(x,y) ------------> (-y,x)

So point C, for instance, would rotate into C' as follows:

C ------------> C'

(-1,6) -----> (-6,-1)

You can do A and B, then plot the points.