This is distance formula is sqr. root of (x1-x2)^2 + (y1-y2)^2 (3-(-4))^2+ (-94-(-195)) 7^2 101^2 49+ 10,201 square root of 10250 101.242 or the closest answer to this
In this We need one more side congruent because one is common i.e FG. It is the line which is Dividing it into two triangles. The property used here is SAS or Side-angle-sideProperty.