Pedro is going to use SAS to prove that $\triangle P Q R \bullet \triangle S Q R$. Which of these is a necessary step in Pedro's proof? A. Prove that $\angle Q P R \geqslant \angle Q S R$ by the Isosceles Triangle Theorem. B. Prove that $P Q \geqslant S Q$ by CPCTC. C. Prove that $\angle P Q R \geqslant \angle S Q R$ by vertical angles. D. Prove that $Q R \geqslant Q R$ by the reflexive property.
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Step 1
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Step 2
: Understand the SAS (Side-Angle-Side) Congruence Theorem

- SAS states that if two triangles have:

Final Answer

Prove that $QR \geqslant QR$ by the reflexive property.