Construction workers use a right angle or a 90 degree angle to make sure the walls and floors of the building are perpendicular.
Construction workers typically use a 90-degree right angle to ensure that the walls and floors of a building are perpendicular. This angle is created using a tool called a framing square or a carpenter's square. It consists of two arms, one longer than the other, forming a right angle. The longer arm is typically held against the wall, while the shorter arm is used to check the perpendicularity of other elements such as floors or other walls.
