HP Prime Graphing Wireless Calculator - Manual (Page 66)

62 Geometry
equilateral_triangle
Draws an equilateral triangle defined by one of its sides; that
is, by two consecutive vertices. The third point is calculated
automatically, but is not defined symbolically. If a lowercase
variable is added as a third argument, then the coordinates
of the third point are stored in that variable. The orientation of
the triangle is counterclockwise from the first point.
equilateral_triangle(point1, point2) or
equilateral_triangle(point1, point2, var)
Examples:
equilateral triangle(0,6) draws an equilateral
triangle whose first two vertices are at (0, 0) and (6,0); the
third vertex is calculated to be at (3,3*√3).
equilateral triangle(0,6, v) draws an equilateral
triangle whose first 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 define a triangle, creates the bisector
of the exterior angles of the triangle whose common vertex is
at the first 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 A.
exbisector(0,–4i,4) draws the line given by y=x
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)