Answer:
AA Similarity Postulate
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent
step 1
Verify the proportion of the corresponding sides
[tex]\frac{PS}{PQ}=\frac{PT}{PR}[/tex]
substitute
[tex]\frac{45}{20}=\frac{36}{16}[/tex]
[tex]2.25=2.25[/tex] ----> is true
Corresponding sides are proportional
Triangle PQR is similar to Triangle PST
That means
Corresponding angles must be congruent
side QR is parallel side ST
and
[tex]m\angle PQR=m\angle PST[/tex] ----> by corresponding angles
[tex]m\angle PRQ=m\angle PTS[/tex] --> by corresponding angles
so
PQR is similar to PST by AA Similarity Postulate