HP Prime Graphing NW280AAABA manual Equation, Extractmeasure, Ordinate, Parameq, Perimeter

equation

Returns the Cartesian equation of a curve in x and y, or the

Cartesian coordinates of a point.

equation(curve) or equation(point)

Example:

If GA is the point at (0, 0), GB is the point at (1, 0), and GC is defined as circle(GA, GB-GA), then equation(GC) returns x2 + y2 = 1.

extract_measure

Returns the definition of a geometric object. For a point, that definition consists of the coordinates of the point. For other objects, the definition mirrors their definition in Symbolic view, with the coordinates of their defining points supplied.

extract_measure(Var)

ordinate

Returns the y coordinate of a point or the y length of a vector.

ordinate(point) or ordinate(vector)

Example:

Example: ordinate(GA) returns the y-coordinate of the point A.

parameq

Works like the equation command, but returns parametric results in complex form.

parameq(GeoObj )

perimeter

Returns the perimeter of a polygon or the circumference of a circle.

perimeter(polygon) or perimeter(circle)

Examples:

If GA is the point at (0, 0), GB is the point at (1, 0), and GC is defined as circle(GA, GB-GA), then perimeter(GC) returns 2π.

Geometry 185