HP Prime Graphing Wireless Calculator - Manual (Page 63)

Geometry 59
On circle
Takes a set of points as argument and tests if they are all on
the same circle. Returns 1 if the points are all on the same
circle and 0 otherwise.
is_concyclic(point1, point2, …, pointn)
Example:
is_concyclic(point(-4,-2), point(-4,2),
point(4,-2), point(4,2)) returns 1
On object
Tests if a point is on a geometric object. Returns 1 if it is and
0 otherwise
is_element(point, object)
Example:
is_element(point , circle(0,1)) returns 1.
Parallel
Tests whether or not two lines are parallel. Returns 1 if they
are and 0 otherwise.
is_parallel(line1, line2)
Example:
is_parallel(line(2x+3y=7),line(2x+3y=9)
returns 1.
Perpendicular
Similar to is_orthogonal. Tests whether or not two lines are
perpendicular.
is_perpendicular(line1, line2)
Isosceles
Takes three points and tests whether or not they are vertices of
a single isosceles triangle. Returns 0 if they are not. If they are,
returns the number order of the common point of the two sides
of equal length (1, 2, or 3). Returns 4 if the three points form
an equilateral triangle.
is_isosceles(point1, point2, point3)
2
2
---- 2
2
---- ( , )