noun
steep angle; sharp angle
Describes a very steep or sharp angle, often in physical contexts like slopes, turns, or bends. Can also be used figuratively for a rapid change.
その坂は急角度で登るのが大変だ。
That slope is at a steep angle and hard to climb.
車が急角度で曲がった。
The car turned at a sharp angle.
鋭角 is the mathematical term for an acute angle (less than 90°), whereas 急角度 is a descriptive term for a steep or sharp angle in everyday contexts.
Compound of 急 (kyū, 'steep, sudden') and 角度 (kakudo, 'angle').