Naming Objects

You can assign a certain name to an object when you create it using the Input Bar:

·        Points: In GeoGebra, points are always named using upper case letters. Just type in the name (e. g., A, P) and an equal sign in front of the coordinates or commands.
Examples: C = (2, 4), P = (1; 180°), Complex = 2 + i

·        Vectors: In order to distinguish between points and vectors, vectors need to have a lower case name in GeoGebra. Again, type in the name (e. g., v, u) and an equal sign in front of the coordinates or commands.
Examples: v = (1, 3), u = (3; 90°), complex = 1 – 2i

·        Lines, circles, and conic sections: These objects can be named by typing in the name and a colon in front of their equations or commands.
Examples: g: y = x + 3, c: (x-1)^2 + (y – 2)^2 = 4,
hyp: x^2 – y^2 = 2

·        Functions: You can name functions by typing, for example, f(x) = or g(x)= in front of the function’s equation or commands.       
Examples: h(x) = 2 x + 4, q(x) = x^2, trig(x) = sin(x)

 

Note:

·        If you don’t manually assign a name to an object, GeoGebra assigns the names of new objects in alphabetical order.

·        You can create indices within the names of objects by using an underscore. For example A1 is entered as A_1 and sAB is entered as s_{AB}.


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