A quarter-circle is a geometrical figure consisting of a quarter of a complete circle. There are several other terms that can be used to describe this shape, such as a quadrant, a quarter turn, and a 90-degree arc. It is often represented by the symbol '¼' and is commonly used in engineering, mathematics, and architecture. It can also be referred to as an arc, a pie slice, or a pizza slice. The term quadrant is commonly used in navigation and astronomy, while the phrase '90-degree arc' is used in geometry and trigonometry. Whatever you choose to call it, a quarter-circle is a fundamental shape that is widely recognized and used across various disciplines.