HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 256)

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is_rhombus

Tests whether or not a set of four points are vertices of a rhombus. Returns 0 if they are not, 1 if they are, and

2 if they are vertices of a square.

is_rhombus(point1, point2, point3, point4)

Example:

is_rhombus(point(0,0), point(-2,2), point(0,4), point(2,2)) returns 2

is_square

Tests whether or not a set of four points are vertices of a square. Returns 1 if they are and 0 otherwise.

is_square(point1, point2, point3, point4)

Example:

is_square(point(0,0), point(4,2), point(2,6), point(-2,4)) returns 1.

LineHorz

Draws the horizontal line y=a.

LineHorz(a)

Example:

LineHorz(-2) draws the horizontal line whose equation is y = –2

LineVert

Draws the vertical line x=a.

LineVert(a)

Example:

LineVert(–3) draws the vertical line whose equation is x = –3

open_polygon

Connects a set of points with line segments, in the given order, to produce a polygon. If the last point is the

same as the rst point, then the polygon is closed; otherwise, it is open.

open_polygon(point1, point2, …, point1) or open_polygon(point1, point2, …,

pointn)

orthocenter

Returns the orthocenter of a triangle; that is, the intersection of the three altitudes of a triangle. The

argument can be either the name of a triangle or three non-collinear points that dene a triangle. In the latter

case, the triangle does not need to be drawn.

orthocenter(triangle) or orthocenter(point1, point2, point3)

Example:

orthocenter(0,4i,4) returns (0,0)

208 Chapter 9 Geometry

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