HP Prime Graphing Wireless Calculator - Manual (Page 30)

26 Geometry
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).
Angle bisector Tap the point that is the vertex of the angle to be bisected (A)
and press
E . Tap another point (B) and press E .
Polygon
The Polygon menu provides tools for drawing various
polygons.
Triangle Tap at each vertex, pressing E after each tap.
Keyboard shortcut: n
Isosceles
Triangle
Draws an isosceles triangle defined by two of its vertices and
an angle. The vertices define one of the two sides equal in
length and the angle defines the angle between the two sides
of equal length. Like equilateral_triangle, you have
the option of storing the coordinates of the third point into a
CAS variable.
isosceles_triangle(point1, point2, angle)
Example:
isosceles_triangle(GA, GB, angle(GC, GA, GB)
defines an isosceles triangle such that one of the two sides of
equal length is AB, and the angle between the two sides of
equal length has a measure equal to that of ∡ ACB.
Right Triangle Draws a right triangle given two points and a scale factor.
One leg of the right triangle is defined by the two points, the
vertex of the right angle is at the first point, and the scale
factor multiplies the length of the first leg to determine the
length of the second leg.
right_triangle(point1, point2, realk)
Example:
right_triangle(GA, GB, 1) draws an isosceles right
triangles with its right angle at point A, and with both legs
equal in length to segment AB.
Quadrilateral Tap at each vertex, pressing E after each tap.