The word "reentering angle" is spelled /riːˈɛntərɪŋ ˈæŋɡəl/. The IPA phonetic transcription represents the sounds of the word. The first syllable /riː/ is pronounced like the word "ree", the second syllable /ˈɛntərɪŋ/ sounds like "en-ter-ing", and the final syllable /ˈæŋɡəl/ is pronounced like "angle". The word refers to an angle formed between two adjacent sides of a polygon when one of the sides intersects the polygon in the opposite direction from the others.
The term "reentering angle" refers to an angle that is formed by two lines when they intersect and one of the angles formed is greater than 90 degrees but less than 180 degrees. In other words, it is an angle that is wider than a right angle but narrower than a straight angle.
When two lines meet or intersect, they form angles at that particular point of intersection. These angles can vary in size and shape. A reentering angle specifically describes a situation where two lines meet, and one of the interior angles formed exceeds 90 degrees, but does not extend to 180 degrees, which would form a full U-turn. This type of angle can be visually distinguished by its shape which resembles the letter "V."
The concept of reentering angles is commonly encountered in various disciplines such as geometry, trigonometry, and engineering. These angles can have practical implications in fields such as architecture, where the understanding of angle measurements is crucial for designing structures.
Moreover, reentering angles are also relevant in computer graphics and game programming, particularly in collision detection algorithms. They help determine the position and direction of objects or characters within a virtual environment, aiding in rendering realistic movements and interactions.
In summary, a reentering angle refers to an angle formed by two lines intersecting, where one of the angles is greater than 90 degrees but less than 180 degrees, resembling a "V" shape.
The term "reentering angle" is not a common phrase or widely used in English. However, if you are referring to the term "re-entrant angle" which is more frequently used, I can provide its etymology.
The word "re-entrant" comes from the French language, where "entrant" means "entering". The prefix "re-" is added to indicate repetition or reversal. In geometrical terms, an angle is defined as the figure formed by two lines or rays diverging from a common point. A re-entrant angle refers to an angle where one of its sides extends inward or "re-enters" the angle's interior.
This term is often used in different fields such as architecture, engineering, and mathematics to describe angles or corners that bend or curve inward rather than continuing outward.