4. When triangle ABC is reflected across line AB, the
image is triangle ABD. Why are segment AD and
segment AC congruent?
D
A. Congruent parts of congruent figures are corresponding.
B. Corresponding parts of congruent figures are congruent.
C. An isosceles triangle has a pair of congruent sides.
D. Segment AB is a perpendicular bisector of segment DC.
(From Unit 2, Lesson 1.)
B
C