HP Prime Graphing Wireless Calculator - Manual (Page 44)

40 Geometry
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,1–2*i,i).
Symbolic view: Cmds menu
For the most part, the Commands menu in Symbolic View is
the same as it is in Plot view. The Zoom category does not
appear in Symbolic view, nor do the Cartesian, Measure,
and Tests categories, although the latter three appear in
Numeric view. In Symbolic view, the commands are entered
using their syntax. Highlight a command and press W to
learn its syntax. The advantage of entering or editing a
definition in Symbolic view is that you can specify the exact
location of points. After the exact locations of points are
entered, the properties of any dependent objects (lines,
circles, and so on) are reported exactly by the CAS. Use this
fact to test conjectures on geometric objects using the Test
commands. All these commands can be used in the CAS
view, where they return the same objects.