Construction workers use a 90 degree angle (also known as a right angle) to make sure that the walls and floors of a building are perpendicular.
Construction workers use a tool called a level to ensure that the walls and floors of a building are perpendicular to each other. The type of angle they use is a right angle. A right angle measures exactly 90 degrees and forms a square corner.
Construction workers use a right angle to ensure that the walls and floors of a building are perpendicular. A right angle measures exactly 90 degrees, forming a square corner where two lines meet. To maintain perpendicularity, they often use tools such as a carpenter's square or a framing square, which have a right angle built into them.
