HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 254)

100

101

equilateral triangle(0,6, v) draws an equilateral triangle whose rst two vertices are at (0, 0)

and (6,0); the third vertex is calculated to be at (3,3*√3) and these coordinates are stored in the CAS variable

v. In CAS view, entering v returns point(3*(√3*i+1)), which is equal to (3,3*√3).

exbisector

Given three points that dene a triangle, creates the bisector of the exterior angles of the triangle whose

common vertex is at the rst point. The triangle does not have to be drawn in the Plot view.

exbisector(point1, point2, point3)

Examples:

exbisector(A,B,C) draws the bisector of the exterior angles of ΔABC whose common vertex is at point

exbisector(0,–4i,4) draws the line given by y=x.

extract_measure

Returns the denition of a geometric object. For a point, that denition consists of the coordinates of the

point. For other objects, the denition mirrors their denition in Symbolic view, with the coordinates of their

dening points supplied.

extract_measure(Var)

harmonic_conjugate

Returns the harmonic conjugate of 3 points. Specically, returns the harmonic conjugate of point3 with

respect to point1 and point2. Also accepts three parallel or concurrent lines; in this case, it returns the

equation of the harmonic conjugate line.

harmonic_conjugate(point1, point2, point3) or harmonic_conjugate(line1,

line2, line3)

Example:

harmonic_conjugate(point(0, 0), point(3, 0), point(4, 0)) returns point(12/5, 0)

harmonic_division

Returns the harmonic conjugate of 3 points. Specically, returns the harmonic conjugate of point3 with

respect to point1 and point2 and stores the result in the variable var. Also accepts three parallel or concurrent

lines; in this case, it returns the equation of the harmonic conjugate line.

harmonic_division(point1, point2, point3, var) or harmonic_division(line1,

line2, line3, var)

Example:

harmonic_division(point(0, 0), point(3, 0), point(4, 0), p) returns point(12/5, 0)

and stores it in the variable p

206 Chapter 9 Geometry

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