5-1 THE STREETS OF SAN FRANCISCO While traveling around the beautiful city of San Francisco, Juanisha climbed several steep streets. One of the steepest, Filbert Street, has a slope angle of 17.5º according to her guidebook. Once Juanisha finished walking 100 feet up the hill, she decided to figure out how high she had climbed. Juanisha drew the diagram below to represent this situation. Can a tangent ratio be used to find $$∆y? Why or why not?