∆PQR was reflected and then dilated by a scale factor of 4 to create ∆P''Q''R''. Which statement explains why ∆PQR is similar to ∆P''Q''R''?

Question

1.  Reflections and dilations preserve side length; therefore, the corresponding sides of ∆PQR and ∆P''Q''R'' are congruent. 
2. Reflections and dilations preserve angle measure; therefore, the corresponding angles of ∆PQR and ∆P''Q''R'' are congruent. 
3. Reflections and dilations preserve orientation; therefore, the corresponding angles of ∆PQR and ∆P''Q''R'' are proportional. 
4. Reflections and dilations preserve collinearity; therefore, the corresponding angles of ∆PQR and ∆P''Q''R'' are congruent.

Answer 1

Diana you need to read/study the material on translations, rotations, and dilations.

Answer 2

The only correct answer is choice 2.