Step 1: Investigate the given figures and compare the measurements

Step 2: Recall the definition of the similar figures

            DEFINITION:  Two figures are similar means that they share a common

          shape. They can be different sizes, but they must have the same shape.

Step 3: Make sure that the given figures are satisfying the definition of similar figures or not.

            NOTE: Similar polygons have the same shape, but can be different sizes. Specifically, two polygons are similar if two things are true:

1. The corresponding sides of each are in the same proportion
2. The corresponding interior angles are the same (congruent).

So when you take a square and compare it with another square, all sides of 1st one are proportional to another. And all angles are of course 90 degrees.

EXAMPLE: The given Figures are not similar because there corresponding angles are not equal.