HP 40gs - Manual (Page 102)

9-2 Triangle Solve aplet
Open the
Triangle
Solver aplet
1. Open the Triangle Solver aplet.
Select
Triangle Solver
The Triangle Solver
aplet opens.
Note: if you have already used the Triangle Solver,
the entries and results from the previous use will still
be displayed. To start the Triangle Solver afresh, clear
the previous entries and results by pressing
CLEAR.
Choose the
triangle type
2. If the last time you used
the Triangle Solver
aplet you used the
right-angled triangle
input form, that input
form is displayed
again (as in the
example at the right). If the triangle you are
investigating is not a right-angled triangle, or you are
not sure what type it is, you should use the general
input form (illustrated in the previous step). To switch
to the general input form, press
.
If the general input form is displayed and you are
investigating a right-angled triangle, press
to
display the simpler input form.
Specify the
known values
3. Using the arrow keys, move to a field whose value
you know, enter the value and press or .
Repeat for each known value.
Note that the lengths of
the sides are labeled
A, B, and C, and the
angles are labeled
α ,
β , and δ . It is important
that you enter the
known values in the
appropriate fields. In our example, we know the
length of two sides and the angle at which those
sides meet. Hence if we specify the lengths of sides A
and B, we must enter the angle as
δ (since δ is the
angle where A and B meet). If instead we entered the
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