GEOMETRY HELP! Medal+fan+testimonial

In ΔRST shown below, segment SU is an altitude:

Which of the following is a justification used while proving the similarity of triangles ΔRUS and ΔSUT?

Transitive Property of Equality
Addition Property of Equality
Definition of Supplementary Angles
Definition of Congruence

Question

GEOMETRY HELP! Medal+fan+testimonial

In ΔRST shown below, segment SU is an altitude:

Which of the following is a justification used while proving the similarity of triangles ΔRUS and ΔSUT?

 Transitive Property of Equality
 Addition Property of Equality
 Definition of Supplementary Angles
 Definition of Congruence

lexiip · Answer

attachment

lexiip · Answer

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lexiip · Answer

please help me someone!!

mathmate · Answer

This kind of question is actually a revision of the definition of certain theorems.
Do you know if the two triangles are congruent, and if so, why?