If RST XYZ, which statement must be true?

Answer: [tex]\angle{R}\cong\angle{X}[/tex]
Step-by-step explanation:
Given: [tex]\triangle{RST}\cong\triangle{XYZ}[/tex]
We know that if two triangles are congruent then their corresponding parts are congruent (CPCTC).
Therefore, [tex]\angle{R}\cong\angle{X}[/tex]
[tex]\angle{S}\cong\angle{Y}[/tex]
[tex]\angle{T}\cong\angle{Z}[/tex]
[tex]\overline{RS}\cong\overline{XY}[/tex]
[tex]\overline{ST}\cong\overline{YZ}[/tex]
[tex]\overline{RT}\cong\overline{XZ}[/tex]
From the given option the right option is [tex]\angle{R}\cong\angle{X}[/tex]