We will PIDU 1.(05.01 LC) Theorem: The segment joining the midpoints of two sides of a trangle is parallel to the third side and half its length. A two-column proof of the theorem is shown, but the proof is incomplete. (6, 8) C (8,4) (2.2) Statement Reason The coordinates of point D are (4, 5) and coordinates of point E are (5, 3) By the midpoint formula Length of segment DE is vs and length of segment AC is 2JS By the distance formula Segment DE is half the length of segment AC Slope of segment DE is -2 and slope of segment AC is - 2 By the slope formula Segment DE is parallel to segment AC Slopes of parallel lines are equal Which of the following completes the proof? (6 points) By definition of congruence O Converse of corresponding angles postulate o By substitution By construction