Here's the image. What is the angle of rotation from / to /? Assume that the center of rotation is the origin.

A.
90° counterclockwise
B.
180° counterclockwise
C.
270° counterclockwise
D.
360° counterclockwise

I need help,

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte