Angles are based on parts of a full turn, which is 360°. A quarter turn is 90° and is called a right angle. A half turn is 180° and is known as a straight angle (or angle on a straight line).

This pivoting hinge stands out for its firm hold at 90-degree angles. The term "Fx" is derived from "fix," highlighting its ability to keep the door in place through powerful retention points.

An eyewitness to the Washington plane disaster has described seeing the plane at a 90 degree-angle seconds before the crash. Ari Schulman said he was driving home when he witnessed the collision.

Although players frequently COD at >90° angles, limited knowledge is available on knee joint kinematics and kinetics during COD at 90° and 135° and whether limb preference impacts knee mechanics ...