The α symbol has the meaning Greek Small Letter Alpha. It belongs to the category Greek Symbols. The alpha symbol is usually simply referred to as “alpha”, which is actually called “beginning” (the beginning of the alphabet). It is the first letter of the Greek alphabet. Incidentally, the associated capital letter looks exactly like the Latin capital A. Often the α sign is used in conjunction with the angular reference in the geometry. The angle α is usually the first angle bottom left then come then the angle β, γ, δ … in a clockwise direction. This way, an angle can be uniquely assigned. Mostly the angle alpha is opposite to the side a. For example, if it is a right angle, α = 90 °.
But not only in mathematics does the aplha symbol apply. Also in physics, astronomy, chemistry, medicine, computer graphics … the α sign is often used.
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