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Geometry symbols

List of Geometry symbols
Source: https://www.rapidtables.com/math/symbols/Basic_Math_Symbols.html#geometry
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Symbol:
Symbol Name: angle
Meaning / definition: formed by two rays
Example: ∠ABC = 30°
Symbol:
Symbol Name: measured angle
Meaning / definition:
Example: ABC = 30°
Symbol:
Symbol Name: spherical angle
Meaning / definition:
Example: AOB = 30°
Symbol:
Symbol Name: right angle
Meaning / definition: = 90°
Example: α = 90°
Symbol: °
Symbol Name: degree
Meaning / definition: 1 turn = 360°
Example: α = 60°
Symbol: deg
Symbol Name: degree
Meaning / definition: 1 turn = 360deg
Example: α = 60deg
Symbol:
Symbol Name: prime
Meaning / definition: arcminute, 1° = 60′
Example: α = 60°59′
Symbol:
Symbol Name: double prime
Meaning / definition: arcsecond, 1′ = 60″
Example: α = 60°59′59″
Symbol:
Symbol Name: line
Meaning / definition: infinite line
Example:
Symbol: AB
Symbol Name: line segment
Meaning / definition: line from point A to point B
Example:
Symbol:
Symbol Name: ray
Meaning / definition: line that start from point A
Example:
Symbol:
Symbol Name: arc
Meaning / definition: arc from point A to point B
Example: = 60°
Symbol:
Symbol Name: perpendicular
Meaning / definition: perpendicular lines (90° angle)
Example: ACBC
Symbol:
Symbol Name: parallel
Meaning / definition: parallel lines
Example: ABCD
Symbol:
Symbol Name: congruent to
Meaning / definition: equivalence of geometric shapes and size
Example: ∆ABC≅ ∆XYZ
Symbol: ~
Symbol Name: similarity
Meaning / definition: same shapes, not same size
Example: ∆ABC~ ∆XYZ
Symbol: Δ
Symbol Name: triangle
Meaning / definition: triangle shape
Example: ΔABC≅ ΔBCD
Symbol: x-y
Symbol Name: distance
Meaning / definition: distance between points x and y
Example: x-y │ = 5
Symbol: π
Symbol Name: pi constant
Meaning / definition: π = 3.141592654...

is the ratio between the circumference and diameter of a circle

Example: c = πd = 2⋅πr