Triangle A'B'C' is a dilation of triangle ABC. 1. What is the measure of angle B'? Explain your reasoning. 2. What is the scale factor that triangle ABC was dilated by to get triangle A'B'C'?

Answer 1

The measure of angle B' will be the same as the measure of angle B, because a dilation does not affect angle measurements.

Without the picture or more information about the points or side lengths, there is not enough information to answer the second question.