The Triangle Solve Aplet; Example 1 - HP 39gs Master Manual

T T
T T
H E R I A N G L E
H E R I A N G L E
This aplet allows you to solve for missing sides and angles in a triangle,
either right angled or not. Unlike most aplets it does not have a
and view but only the dual view discussed below.
NUM PLOT
When you first start the aplet you will be presented with one of two
views. The view right is for a general triangle, while the second view
assumes a right triangle. Obviously the amount of information which
must be supplied is less for the right triangle.
The choice of which view you use is controlled by the button labeled
, short for "rectangular". When
dot) you are supplying information for a right triangle.
In both cases the procedure is to supply sufficient information to allow the triangle to be solved, hence the
message to "Fill 3 out of 6 values". This request should be taken with a pinch of salt. For example, in the
case of a right triangle it is actually only necessary to
values despite what is stated.
E x a m p l e 1
E x a m p l e 1
Solve the triangle shown right.
Use the Aplet view to select and
The second is to ensure that we are working in degree mode. Change
to the view and choose
MODES
Now press (or
SYMB NUM
right.
S A
S A
O L V E P L E T
O L V E P L E T
is selected (shown by the
the aplet.
.
Degrees
or ) to change back to the view shown
PLOT
,
SYMB
15cm
152
25
supply 2
7cm
115°