Well I need help with this question to save me on a test

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

What is true about the dilation? it is a reduction with a scale factor between 0 and 1. it is a reduction with a scale factor greater than 1. it is an enlargement with a scale factor between 0 and 1. it is an enlargement with a scale factor greater than 1.