HP Prime Graphing Calculator - Manual (Page 161)

Geometry 157
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.
Altitude Tap on a point (A) and press E . Tap on a segment and
press E . A line is drawn through the point (A)
perpendicular to the segment (or its extension).
Polygon
The Polygon menu provides tools for drawing various
polygons.
Triangle Tap at each vertex, pressing E after each tap.
Keyboard shortcut: n
Quadrilateral Tap at each vertex, pressing E after each tap.
Ngon
Polygon5 Produces a pentagon. Tap at each vertex, pressing E
after each tap.
Polygon6 Produces a hexagon. Tap at each vertex, pressing E
after each tap.
Hexagon Produces a regular hexagon (that is, one with sides of equal
length and angles of equal measure). Tap on a point and
press
E . Tap on a second point to define the length of
one side of the regular hexagon and press E . The other