If ED is the midsegment of ABC, which of the following statements are necessarily true?​

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

Which image (a’ b’ c’ d’) of abcd cannot he produced using only reflections ?

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)