HP Prime Graphing Calculator - Manual (Page 162)

158 Geometry
four vertices are automatically calculated and the regular
hexagon is drawn.
Special
Eq. triangle Produces an equilateral triangle. Tap at one vertex and press
E . Tap at another vertex and press E . The
location of the third vertex is automatically calculated and the
triangle is drawn.
Square Tap at one vertex and press E . Tap at another vertex
and press E . The location of the third and fourth
vertices are automatically calculated and the square is drawn.
Parallelogram Tap at one vertex and press E . Tap at another vertex
and press E . Tap at a third vertex and press E .
The location of the fourth vertex is automatically calculated
and the parallelogram is drawn.
Curve
Circle Tap at the center of the circle and press E . Tap at a
point on the circumference and press E . A circle is
drawn about the center point with a radius equal to the
distance between the two tapped points.
Keyboard shortcut:
F
You can also create a circle by first defining it in Symbolic
view. The syntax is circle(GA,GB) where A and B are two
points. A circle is drawn in Plot view such that A and B define
the diameter of the circle.
Ellipse Tap at one focus point and press E . Tap at the second
focus point and press E . Tap at point on the
circumference and press E .
Hyperbola Tap at one focus point and press E . Tap at the second
focus point and press E . Tap at point on one branch of
the hyperbola and press E .
Parabola Tap at the focus point and press E . Tap either on a line
(the directrix) or a ray or segment nd press E .