HP Prime Graphing Wireless Calculator - Manual (Page 45)

Geometry 41
Point
Point
Creates a point, given the coordinates of the point. Each
coordinate may be a value or an expression involving
variables or measurements on other objects in the geometric
construction.
point(real1, real2) or point(expr1, expr2)
Examples:
point(3,4) creates a point whose coordinates are (3,4).
This point may be selected and moved later.
point(abscissa(A), ordinate(B)) creates a point
whose x-coordinate is the same as that of a point A and
whose y-coordinate is the same as that of a point B. This point
will change to reflect the movements of point A or point B.
Point on
Creates a point on a geometric object whose abscissa is a
given value or creates a real value on a given interval.
element(object, real) or element(real1..real2)
Examples:
element(plotfunc(x 2 ),–2) creates a point on the
graph of y = x 2 . Initially, this point will appear at (–2,4). You
can move the point, but it will always remain on the graph of
its function.
element(0..5) creates a slider bar with a value of 2.5
initially. Tap and hold this value to open the slider. Select >
or < to increase or decrease the value on the slider bar.
Press J to close the slider bar. The value that you set can
be used as a coefficient in a function that you subsequently
plot or in some other object or calculation.
Midpoint
Returns the midpoint of a segment. The argument can be
either the name of a segment or two points that define a
segment. In the latter case, the segment need not actually be
drawn.
midpoint(segment) or midpoint(point1, point2)
Example: midpoint(0,6+6i) returns point(3,3)