Feldspar has a flat, crystal shape with sharp edges and no right angles. feldspar is part of the

isometric crystal system
monoclinic crystal system
hexagonal crystal system
triclinic crystal system

really dont know just need some points

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a