Practice problem
Slopes of Perpendicular Lines
(Source: www.wikipedia.com)
The Leaning Tower of Pisa has an slant from center. If the tower was mapped onto a 2-dimensional grid, this would correspond to a slope of about . Given that each horizontal ring around the tower is perpendicular to the line passing vertically through the tower, what is the slope of one of these rings on the 2-dimensional grid?