Definition: We say that a geometric figure is completely determined by a set of conditions if all figures created under those conditions are congruent*.
Rules: Using the term "completely determined" usually means that all of the given conditions are necessary. That is, if one or more of the conditions are missing then non-congruent figures can be constructed (see example 2 below).
* Let's remember: Two geometric figures or objects are congruent if there is a combination of a translation (shift), rotation and/or reflection so that the figures match exactly.
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