Final answer:
The congruence of angles illustrated by the statement is an example of the transitive property of equality, meaning if two angles are both equal to a third angle, they are equal to each other.
Step-by-step explanation:
The statement that if LR=LT, then LTS is congruent to LR illustrates the transitive property of equality in the context of congruence of angles.
This property is essential for establishing the equivalence of angles or segments based on a common measure. In other words, if two angles are both equal to a third angle, then they are equal to each other, which is the essence of the transitive property.