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No, see solution.
To determine if this congruence theorem is valid or not, let's begin by considering a kite.
Then, any point on PR will generate a pair of consecutive congruent sides. Thus, let's consider a point Z on it such that ZQ = QR.
We now have two kites – namey, PQRS and PQZS. Next, let's list the congruent parts between them. ccc RS ≅ ZS & & Side SP ≅ SP & & Side ∠P ≅ ∠P & & Angle PQ ≅ PQ & & Side QR ≅ QZ & & Side Notice that the two kites meet the conditions of the given theorem but they are not congruent because the corresponding angles are not congruent. Therefore, SSASS is not a valid congruence theorem for kites.
When the congruent angles are the ones formed by the noncongruent sides, we have that both kites are the same, so they are congruent in this case. However, since we found an example where the SSASS congruence theorem fails, we can claim that it is not valid.