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 noncongruent figures can be constructed (see example 2 below).
Examples:

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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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