HP Prime Graphing Wireless Calculator - Manual (Page 33)

Geometry 29
Tap at each vertex of the
triangle, pressing
E
after each tap.
The excircle is drawn tangent
to the side defined by the last
two vertices tapped. In the
example at the right, the last
two vertices tapped were A
and C (or C and A). Thus the excircle is drawn tangent to the
segment AC.
Incircle An incircle is a circle that is tangent to all three sides of a
triangle. Tap each vertex of the triangle, pressing
E
after each tap.
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 .
Conic Plots the graph of a conic section defined by an expression in
x and y.
conic(expr)
Example:
conic(x^2+y^2-81) draws a circle with center at (0,0)
and radius of 9
Locus Takes two points as its arguments: the first is the point whose
possible locations form the locus; the second is a point on an
object. This second point drives the first through its locus as the
second moves on its object.