Given that triangle \( \triangle EFG \) is rotated \( -90 \) degrees (clockwise) to form triangle \( \triangle XYZ \), we know that the corresponding vertices of the triangles will match up in a specific way due to the nature of rotations.
In general, when a figure is rotated, the following properties hold true:
- Corresponding angles of the original figure and the rotated figure are congruent.
- Corresponding sides of the original figure and the rotated figure are also congruent.
Based on this information, we can assess the statements provided:
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\( \angle E \cong \angle X \): Since after a \( -90^\circ \) rotation, \( \angle E \) (from vertex E) will correspond to \( \angle X \) (in the new triangle), this statement is true.
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\( EF \cong XZ \): This states that the side connecting vertices E and F is congruent to the side connecting vertices X and Z. Since they are corresponding sides after the rotation, this statement is true.
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\( \angle F \cong \angle Z \): Following the same reasoning, as \( \angle F \) corresponds to \( \angle Z \) after rotation, this statement is also true.
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\( EG \cong XY \): As the side EF corresponds to XZ and side EG corresponds to side XY (due to the nature of the rotation), this statement is similarly true.
Thus, all statements—1, 2, 3, and 4—are true based on the properties of rotation. However, if you are asked to select only one statement that must be true, it might depend on the specific context or focus of your question.
If you only need to choose one:
- Answer: \( \angle E \cong \angle X \) (if focusing solely on angles), or \( EF \cong XZ \) (if focusing on sides).
If you're asked for a specific option that must be true among the provided options, you could choose either depending on what aspect (angles or sides) is more central to your question.