How do you know that △STU is similar to △PQR? Complete the sentence to explain your answer. Triangles P Q R and S T U on a coordinate plane. The larger triangle has coordinates P negative 1 comma 1, Q negative 2 comma 3, and R negative 2.5 comma 1. The smaller triangle has coordinates S negative zero point 5 comma negative zero point 5, T negative 1 comma negative 1.5, and U negative 1.25 comma negative zero point 5.

△STU is mapped to △PQR by a dilation with center (
,
) and scale factor
, and a reflection across the
-axis.