A right angle is a geometric term used to describe a specific angle that measures exactly 90 degrees. In geometrical terms, an angle refers to the amount of rotation between two intersecting lines, typically measured in degrees. When two lines intersect to form a right angle, they create two perpendicular lines, dividing the plane into four quadrants.
The term "right" in right angle originates from the Latin word "rectus" meaning straight or proper. As such, a right angle is often associated with proper or correct positioning. It is the most basic and widely recognizable angle, commonly represented by a box-like symbol: 90°.
When referring to a right angle, both of its sides are perpendicular, meaning they meet at a 90-degree angle, forming a distinct "L" shape. Each side of a right angle is called a leg, whereas the point where both legs meet is known as the vertex. The two legs are equal in length, further adding to the symmetry and balance associated with right angles.
Due to its precision and equality, right angles frequently appear in various fields, such as mathematics, engineering, architecture, and construction. They serve as building blocks for geometric shapes, including rectangles, squares, and cubes. Additionally, the concept of right angles is crucial in trigonometry, allowing for calculations involving sine, cosine, and tangent functions.
In summary, a right angle is a 90-degree angle formed when two lines intersect, recognized for its symmetry, perpendicular sides, and association with proper positioning and balance.
