When people use degrees, they either use "degrees" as in 30 degrees, or the little circle as in 30o. For Radians, they might say radians or possibly R or Rad.
That symbol is called the radical.
The symbol that you describe seems to be the greek letter Phi. It is normally used to indicate a variable that is an angle, just as x is used to indicate a variable that is a numeric quantity.
The symbol (g) typically represents the acceleration due to gravity, which is approximately 9.81 meters per second squared (m/s²) on the surface of Earth. It is often used in physics and engineering to denote gravitational force acting on an object. In other contexts, (g) can also indicate grams when used as a unit of mass in measurements.
The symbol ( y ) typically represents a variable or an unknown value in mathematics and science. It is often used to denote the dependent variable in functions, particularly in the context of Cartesian coordinates, where ( y ) represents the vertical axis. In other contexts, ( y ) may also signify a specific quantity or measurement, depending on the subject matter.
It can be though it is more often used to denote a variable.
The symbol commonly used to denote entropy is S.
G
The symbol used to denote "is an element of" is ( \in ). It indicates that a particular object belongs to a set. For example, if ( a ) is an element of set ( A ), it is written as ( a \in A ).
That symbol is called the radical.
A right angle is typically identified by a small square symbol placed at the vertex of the angle. This square indicates that the angle measures exactly 90 degrees, distinguishing it from acute and obtuse angles. In diagrams, this representation helps to clearly denote right angles in geometric figures.
A protractor is used to measure an angle.
A protractor can be used to measure an angle.
Any symbol can be used to denote a set of integers. The set of all integers is denoted by Z, and the set of natural numbers by N.
Feet are usually written as ', and the symbol is also used to denote arcminutes. Prime units of any type will also be marked in such a manner, as are minutes of angle and time.
The instrument used to measure a angle is called a protractor!
The shape or symbol used to denote infinity is a 8 on its side: "∞"
The shape or symbol used to denote infinity is a 8 on its side: "∞"