Answer:
the would be 85.7 %
you would do 66/77 which is .857142857
then move the decimal point two spots and round then you'll get 85.7 %
No because the angle of point C is NOT congruent to the angle of point A.
Step-by-step explanation:
A quadrilateral MUST be a parallelogram if it has both pairs of its opposite angles congruent.