Question 10 • High School Math 2 A
SAS requires two pairs of corresponding sides and the angle included between those sides to be congruent. The right angles ∠Q and ∠T are congruent, and RQ ≅ NT gives one pair of corresponding sides, but no second pair of sides is given. Therefore, another pair of corresponding sides must be known before SAS can establish congruence; the correct choice is C.
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