Right angle

A right angle is an angle of exactly 90 degrees, forming a perfect corner like the corner of a square or rectangle. It divides space into two equal, perpendicular parts—meaning the two lines or surfaces meet at this angle without slant or tilt. You can think of it as the angle between the edges of a standard door frame or a piece of paper folded at right angles. Right angles are fundamental in geometry, construction, and design because they create precise, stable shapes and structures.