The proof that δqpt ≅ δqrt is shown. given: sp ≅ sr prove: δqpt ≅ δqrt what is the missing reason in the proof? statements reasons 1. sp ≅ sr 1. given 2. st ⊥ pr 2. converse of the perpendicular bisector theorem 3. pt ≅ rt 3. ? 4. qt ⊥ pr 4. st and qt name the same line. 5. qp ≅ qr 5. perpendicular bisector theorem 6. δqpt ≅ δqrt 6. hl theorem definition of perpendicular bisector definition of congruence reflexive property substitution property