this is a picture of a bridge. The very side of the road under the bridge forms a straight line and that line is skew to the straight line formed by the top layer of bricks. These lines are skew because they are not parallel and they dont intersect. So basically, they are non coplanar. Bridges are used for cars to get over bodies of water and to provide other routes to get places. Also some bridges are landmarks. Bridges are used by almost everyone who lives near the water and drives a car.
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