Explain how you can obtain a true bias on a fabric

The true bias refers to the 45 degree angle that intersects the warp (length of grain) and the weft (cross grain) of a woven fabric. Every piece of woven fabric has two true biases perpendicular to each other. ... The Savannah camisole is cut on the bias for an easy flow and comfortable stretch that skims the body.

The term collage was coined by both  georges braque  and  pablo picasso  in the beginning of the 20th century when collage became a distinctive part of modern art.hope this sorry if there wasn't more of an explanation!