The first part of the question is not needed we only need to know M1 and M2 (y2-y1)^2+(x2-x1)^2=(your answer)^2 (5-16)^2+(-3-2)^2=(your answer)^2 (-11)^2+(-5)^2=(your answer)^2 121+25=(your answer)^2 146=(your answer)^2 √146=12.0830459735945721 nearest tenth=12.1