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An angle is a geometric concept that refers to the space between two intersecting lines or surfaces that meet at a point. It is a fundamental concept in mathematics, physics, engineering, and many other fields. Angles are measured in degrees or radians and are used to describe the orientation of objects in space, the direction of motion, and the relationship between different parts of a system. One important aspect of angles is their classification based on their size. An angle that measures less than 90 degrees is called an acute angle, while an angle that measures exactly 90 degrees is called a right angle. An angle that measures more than 90 degrees but less than 180 degrees is called an obtuse angle, and an angle that measures exactly 180 degrees is called a straight angle. Angles that are greater than 180 degrees but less than 360 degrees are called reflex angles, and angles that measure exactly 360 degrees are called full angles. Another important aspect of angles is their relationship to trigonometric functions such as sine, cosine, and tangent. These functions relate the ratios of the sides of a right triangle to the angles of the triangle. Trigonometry is used extensively in fields such as navigation, surveying, and engineering to calculate distances, heights, and angles. In addition to their mathematical and scientific applications, angles also play an important role in art, design, and aesthetics. The use of angles can create visual interest, balance, and harmony in a composition. For example, the angles of a building or a piece of furniture can affect its overall appearance and functionality. Overall, angles are a fundamental concept in many fields and have a wide range of applications. Understanding angles and their properties is essential for solving problems in mathematics, science, engineering, and design.

geometry, trigonometry, classification, acute angle, right angle, obtuse angle, reflex angle, full angle, trigonometric functions, navigation, surveying, engineering, aesthetics, composition

**CITATION** : "Kevin Smith. 'Angle.' *Design+Encyclopedia*. https://design-encyclopedia.com/?E=381139 (Accessed on September 08, 2024)"

Angle is a geometric shape which can be defined as the space between two intersecting lines or surfaces which meet at an apex. It is measured in degrees, and is one of the most basic shapes used in geometry, architecture and masonry. In construction, angles are used to form walls and other structures, providing stability and strength for the structure. In architecture, angles are used to create visual interest and balance in design. For example, the angles of a roof can be used to create an aesthetically pleasing design, or the angles of a window can be used to create a pleasing view. In masonry, angles are used to create brick walls, arches and other features. Angle is a crucial element in the design of any structure, and must be carefully considered when constructing a building or other structure.

Right angle, acute angle, obtuse angle, reflex angle, complementary angle

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