HP Prime Graphing Wireless Calculator - Manual (Page 29)

Geometry 25
Random Points Press E to randomly create a point in Plot view.
Continue pressing E to create more random points.
Press J when you are done.
Line
Segment Tap where you want one endpoint to be and press E .
Tap where you want the other endpoint to be and press
E . A segment is drawn between the two end points.
Keyboard shortcut: r
Ray Tap where you want the endpoint to be and press E .
Tap a point that you want the ray to pass through and press
E . A ray is drawn from the first point and through the
second point.
Line Tap at a point you want the line to pass through and press
E . Tap at another point you want the line to pass
through and press E . A line is drawn through the two
points.
Keyboard shortcut:
j
Tap a third point (C) and press E . A line is drawn
through A bisecting the angle formed by AB and AC.
Parallel Tap on a point (P) and press E . Tap on a line (L) and
press E . A new line is draw parallel to L and passing
through P.
Perpendicular Tap on a point (P) and press E . Tap on a line (L) and
press E . A new line is draw perpendicular to L and
passing through P.
Tangent Tap on a curve (C) and press E . Tap on a point (P) and
press E . If the point (P) is on the curve (C), then a single
tangent is drawn. If the point (P) is not on the curve (C), then
zero or more tangents may be drawn.
Median Tap on a point (A) and press E . Tap on a segment and
press E . A line is drawn through the point (A) and the
midpoint of the segment.