Question

Is rst=xyz if so ,name the postulate that applies

Answer 1

Its going to be congruent - SAS

Answer 2

Answer:

Side Side Angle (SSA) congruence.

Explanation:

1) Retrieving the missing data:

$Is \bigtriangleup RST \:=\bigtriangleup XYZ?$

$\overline{RS}\cong \overline{XY}\\\overline{ST}\cong \overline{YZ}\\\angle S \cong \angle Y$

Check the triangles below:

2) Side Angle Side congruence tells us that a pair of triangles are congruent if  and only if their respective side, angle and side are congruent. Since RS ≅ XY and ST≅YZ and in addition to this, ∠S≅∠Y then the it's SSA postulate.

So, it's SSA.