Terry Simpson wrote: >No. A grad is not a grade. A grade is the rise in height divided >by the road >distance travelled expressed as a percentage. A 100% grade = 45 degrees.
If a 100% grade is 45 degrees, then a grade must be the rise (or fall) in height, divided by the horizontal distance traveled, not the road distance traveled (which would be along the hypotenuse of the implied triangle). Bill Potts, CMS Roseville, CA http://metric1.org [SI Navigator]
