What are the 3 requirements to be similar figures?

Answer 1

Same angles, same shape and proportioned to another bigger or smaller shape

Answer 2

The three requirements to be similar figures are:

1. Corresponding angles must be congruent (equal in measure).
2. Corresponding sides are in proportion; this means that the ratio of corresponding side lengths is the same for all sides.
3. The figures have the same shape, but can be of different sizes.