see pictures below1) given: d is the midpoint of segment a c., segment b d is perpendicular to segment a c. prove: triangle a d b is congruent to triangle c d b. refer to the proof above to answer the following 5 questions. what should replace (a) in the proof? segment a b is congruent to segment c b. segment a d is congruent to segment d c. segment b d is congruent to segment a c. segment a c is congruent to segment a c. 7. what should replace (b) in the proof? midpoint perpendicular lines right angles right triangles 8. what should replace (c) in the proof? definition of perpendicular lines definition of right angles definition of midpoint definition of right triangles 9. what should replace (d) in the proof? symbols for segment a c is congruent to segment a c. symbols for segment a b is congruent to segment a b. symbols for segment b c is congruent to segment b c. symbols for segment b d is congruent to segment b d. 10. what should replace (e) in the proof? ssa postulate sss postulate ll theorem hl theorem