A hit that looks like a slash across the body, used by batter to hit the ball "square" to his batting position in baseball terms, like a hit towards first base by a right-handed batter, or third base by a left-hander
Usually used in reference to the end of the tail, the end cut is made perpendicular to the edge of the top chord
A ninety-degree angle A framing square is most often used to square the ends of boards A square cut when referred to rafters pertains to the rafter tail the end of the rafter is cut on a ninety-degree angle rather than a plumb cut