When triangle \( \triangle EFG \) is rotated -90 degrees (clockwise), the corresponding points in triangle \( \triangle XYZ \) will be transformed as follows:
- Point \( E \) maps to point \( X \)
- Point \( F \) maps to point \( Z \)
- Point \( G \) maps to point \( Y \)
Considering this transformation, we can determine the following statements:
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\( \overline{EF} \cong \overline{XZ} \): This statement is not necessarily true. The segments may or may not be congruent depending on the properties of the original triangle and its orientation.
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\( \overline{EG} \cong \overline{XY} \): This statement is also not necessarily true for the same reasons as above.
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\( \angle F \cong \angle Z \): This statement is true. Rotation preserves the angles of the triangle, so corresponding angles will remain congruent.
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\( \angle E \cong \angle X \): This statement is also true for the same reason; the angles remain congruent under rotation.
Thus, the statements that must be true after the rotation are:
- \( \angle F \cong \angle Z \)
- \( \angle E \cong \angle X \)
So, the correct true statements are:
- \( \angle F \cong \angle Z \)
- \( \angle E \cong \angle X \)