To determine the pairs of congruent corresponding angles in triangles \( \triangle MNO \) and \( \triangle RTS \), we can compare the angles of both triangles.
Given:
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In \( \triangle MNO \):
- \( m\angle M = 78° \)
- \( m\angle N = 34° \)
- \( m\angle O = 68° \)
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In \( \triangle RTS \):
- \( m\angle R = 78° \)
- \( m\angle S = 68° \)
- \( m\angle T = 34° \)
Now we can match the angles:
- \( \angle M \) in \( \triangle MNO \) (78°) corresponds to \( \angle R \) in \( \triangle RTS \) (78°). Therefore, \( \angle M \cong \angle R \).
- \( \angle N \) in \( \triangle MNO \) (34°) corresponds to \( \angle T \) in \( \triangle RTS \) (34°). Therefore, \( \angle N \cong \angle T \).
- \( \angle O \) in \( \triangle MNO \) (68°) corresponds to \( \angle S \) in \( \triangle RTS \) (68°). Therefore, \( \angle O \cong \angle S \).
Thus, the pairs of congruent angles are:
- \( \angle M \cong \angle R \)
- \( \angle N \cong \angle T \)
- \( \angle O \cong \angle S \)
The correct option describing these pairs is: ∠M≅∠R, ∠N≅∠T, ∠O≅∠S.