Reflection across y=-2 R(2,-5), S(4,0), T(5,-5). PLEASE HELP I HAVE NO IDEA HOW TO DO THIS AND I HAVE THIS TEST DUE TODAY

Me find the measure to side c and the process to solve the problem you appreciate it : )

Which geometric principle is used to justify the construction below?

Meg constructed triangle poq and then used a compass and straightedge to accurately construct line segment os, as shown in the figure below, which could be the measures of angles pos and angle poq?