HP Prime Graphing Wireless Calculator Manual do Utilizador descarregar pdf (Página 237)

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Parallelogram

Tap a point and press to select it. Repeat to select four points. The test appears at the top of the

display, along with its result. The test returns 0 if the points do not form a parallelogram. Returns 1 if they

form a parallelogram, 2 if they form a rhombus, 3 if they form a rectangle, and 4 if they form a square.

Conjugate

Tap a circle and press to select it. Then, select two points or two lines. The test returns 1 if the

two points or lines are conjugates for the circle; otherwise, it returns 0.

Geometry functions and commands

The list of geometry-specic 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.

Calculations referring to geometric objects—in the Numeric view of the Geometry app and in the CAS—must

use the G-prexed name given for it in Symbolic view.

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

Further, in many cases the specied parameters in the following syntax 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 dened 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

to learn its syntax. The advantage of entering or editing a denition 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.

Point

Creates a point, given the coordinates of the point. Each coordinate may be a value or an expression involving

variables or measurements on other objects in the geometric construction.

point(real1, real2) or point(expr1, expr2)

Examples:

point(3,4) creates a point whose coordinates are (3,4). This point may be selected and moved later.

Geometry functions and commands 189

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