I occasionally use google earth and notice that the slope percentage is never cross 100%, if slope percentage is determined by rise over run method the 100 percent value is equal to a 45-degree slope angle. By noticing this a doubt is arise on my preconceived notion and I begin some online research but could not find anything about the slope determination criteria in the elevation profile of Google Earth. I also search on Google Earth's official website for any reference source but could not find anything. Is Google Earth's slope determination criteria in the elevation profile is based on rise over the hypotenuse? Please provide a reference source from Google Earth where they mentioned about the slope determination criteria in the elevation profile it will be very helpfull.