A gradient of 7% means that the road an inclination whose sine is 0.07 radians = 0.07 x 200 / � grades, grads or gons = 4.456...grades, grads or gons.
Curious to find which term for 1/100 of the right angle is used in various languages I searched my English, French, Spanish, German, Italian, Russian, Greek and Dutch dictionaries without success. It seems that the ordinary person doesn't do angles.
My expression "sine is 0.7 radians ......gons" is nonsense.
I have discovered a definition of the grade (1/100 of the right angle) in French, see my USMA 26381.
-- Joseph B. Reid 17 Glebe Road West Toronto M5P 1C8 Telephone 416-486-6071
