Alpha, this is the legendary alpha. In fact, it looks a bit like the English lowercase letter A, which is one of the Greek letters. In high school and junior high school, it can be used to refer to angles and planes, such as angle α and plane α.

This symbol can also be used instead of the name of the corner. For example: α

Attachment: α is similar to A, but not the same character. The names used to express angles are β, γ and so on.

Extended data:

Related Greek letters

αα:α

ββ:β

γγ:γ

δδ:δ

εε:ε

Zeta zeta

εη:Eta

θθ:θ

ιι:Iota

Permutation and combination symbol

c？ Number of combinations

A (or p)? number of permutations

n？ Total number of elements

r？ Number of elements participating in the selection

! ? Factorial, such as 5! =5×4×3×2× 1= 120, specify 0! = 1

Relational character

For example, "=" is an equal sign, "≈" is an approximate sign, "≦" is an unequal sign and ">" is a greater than sign. "

"∨" is a coordinate symbol, "⊥" is a vertical symbol, "∧" is a proportional symbol (reciprocal relation can be used to express inverse proportion), "∈" is a symbol, "?" Contained in the symbol "?" Does the symbol "|" in mean "divisible" (for example, a|b? It means "A is divisible by B", while ||b means that R is the greatest power of A divisible by B), and any letter such as X and Y can represent an unknown number.