Question

1. when triangle abc is reflected across ab, the image is triangle abd. why are segments ad and ac congruent? 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. ab is a perpendicular bisector of dc.

Explanation:

When a triangle is reflected across a line, the original triangle and its image are congruent. Corresponding parts of congruent figures are congruent. Since triangle ABC is reflected across AB to get triangle ABD, AD and AC are corresponding sides of congruent triangles.

Answer:

a. Congruent parts of congruent figures are corresponding.