Question

select the correct choice that completes the sentence below.
two polygons are similar if their corresponding angles have the same measure and the lengths of their corresponding sides are in

Explanation:

Step1: Recall Similar Polygons Definition

Similar polygons have corresponding angles equal (same measure) and corresponding sides in proportion (constant ratio).

Step2: Identify the Missing Term

The definition of similar polygons states that corresponding sides are in a constant ratio (or proportion). So the blank should be filled with "proportion" (or "a constant ratio").

Answer:

proportion (or a constant ratio)