Your sister uses a cardboard square and the lines of
her eyesight to align the top and bottom of the rock
wall. The horizontal measure from her to the rock
wall is 13 feet 5 inches, while the vertical distance
from the ground to her eyes is 5 feet 6 inches. What
method is she using to approximate the height of the
rock wall? Use this method to approximate the
height of the rock wall. Show your work.