HP Prime Graphing Wireless Calculator - Manual (Page 64)

60 Geometry
Example:
is_isoscelesl(point(0,0), point(4,0),
point(2,4)) returns 3.
Equilateral
Takes three points and tests whether or not they are vertices of
a single equilateral triangle. Returns 1 if they are and 0
otherwise.
is_equilateral(point1, point2, point3)
Example:
is_equilateral(point(0,0), point(4,0),
point(2,4)) returns 0.
Parallelogram
Tests whether or not a set of four points are vertices of a
parallelogram. Returns 0 if they are not. If they are, then
returns 1 if they form only a parallelogram, 2 if they form a
rhombus, 3 if they form a rectangle, and 4 if they form a
square.
is_parallelogram(point1, point2, point3,
point4)
Example:
is_parallelogram(point(0,0), point(2,4),
point(0,8), point(-2,4)) returns 2.
Conjugate
Tests whether or not two points or two lines are conjugates for
the given circle. Returns 1 if they are and 0 otherwise.
is_conjugate(circle, point1, point2) or
is_conjugate(circle, line1, line2)
Other Geometry functions
The following functions are not available from a menu in the
Geometry app, but are available from the Catlg menu.
affix
Returns the coordinates of a point or both the x- and y-lengths
of a vector as a complex number.
affix(point) or affix(vector)