This Problem Set is a part of the Lesson 13, Unit 1, Grade 8. The focus here is on the fact that the distance between any pair of corresponding points of congruent figures must be the same. congruent: that is, if there is a pair of points on one figure that are a different distance apart than the corresponding points on Understand that all corresponding distances between pairs of points are equal in congruent figures. Understand that all corresponding distances between pairs of points are equal in congruent figures.