Points and Vectors

Points and vectors may be entered in Cartesian or polar coordinates (see section Numbers and Angles).

Note: Upper case labels denote points whereas lower case labels refer to vectors.

 

Examples:

·        To enter a point P or a vector v in Cartesian coordinates you may use P = (1, 0) or v = (0, 5).

·        In order to use polar coordinates type in P = (1; 0°) or v = (5; 90°).
Note: You need to use a semicolon to separate the two coordinates. If you don’t type in the degree symbol, GeoGebra will treat the angle as if entered in radians.

 

In GeoGebra, you can also do calculations with points and vectors.

Examples:

·        You can create the midpoint M of two points A and B by entering
M = (A + B) / 2 into the Input Bar.

·        You may calculate the length of a vector v using length = sqrt(v * v)


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