Special right triangles! help!

Given right triangle xyz, which correctly describes the locations of the sides in relation to

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Write an equation for the function that includes the points (2,100)and (3,100)