the.com/slopes
Where mountains lean, water races, and skiers test the math of gravity.
means Surfaces or lines that tilt, rising or falling at an angle rather than staying flat.
from From Middle English aslope, meaning at a slant; the word itself leans, fittingly.
Math meaningRise over run — the steepness of any line.
Ski termHitting the slopes predates lifts by a century.
Soil scienceSlope angle decides where rainwater goes and stays.