HP Prime Graphing NW280AAABA Geometry functions and commands, Symbolic view Cmds menu, Point

Geometry functions and commands

The list of geometry-specific functions and commands in this

section covers those that can be found by tapping in both Symbolic and Numeric view and those that are only available from the Catlg menu.

The sample syntax provided has been simplified. Geometric objects are referred to by a single uppercase character (such as A, B,C and so on). However, calculations referring to geometric objects—in the Numeric view of the Geometry app and in the CAS—must use the G-prefixed name given for it in Symbolic view. For example:

altitude(A,B,C) is the simplified form given in this section

altitude(GA,GB,GC) is the form you need to use in calculations

Further, in many cases the specified parameters in the syntax below—A, B, C etc.—can be the name of a point (such as GA) or a complex number representing a point. Thus angle(A,B,C) could be:

•angle(GP,GR,GB)

•angle(3+2i,1–2i,5+i) or

•a combination of named points and points defined by a complex number, as in angle(GP,i1–2i,i).

Symbolic view: Cmds menu

Point

barycenter

Calculates the hypothetical center of mass of a set of points, each with a given weight (a real number). Each point, weight pair is enclosed in square brackets as a vector.

barycenter([[point1, weight1], [point2, weight2],…,[pointn, weightn]])

Example:	⎛	point(1) 1	⎞
barycenter	⎜		⎟	returns point (1/2, 1/4)
	⎜⎜	point(1+i) 2	⎟⎟
	⎝	point(1–i) 1	⎠

Geometry 165