Sharp EL-9600 - Page 49

Press 2ndF EXE and an autoscaled graph of the two sides of the equation is
drawn and the solution is obtained.
Another formula for area of a triangle is Heron's formula. Enter Heron’s formula,
A = [S(S-X)(S-Y)(S-Z)], press CL three times, and type the following: ALPHA
A ALPHA = 2ndF ALPHA S
(
ALPHA S – ALPHA X
)(
ALPHA S – ALPHA Y
)(
ALPHA S – ALPHA Z
)
.
(Note that the square root symbol extends over the entire right hand side of the
equation, automatically grouping the expression under it.)
You could enter the semiperimeter, S = (X + Y + Z), in a separate formula in
the SOLVER, but it is probably easier to find the value of S in the computation
mode and then use Heron’s formula in the SOLVER. Press ENTER to view
the variable list.
For Discussion
Students can discuss the steps to enter the distance formula in the SOLVER.
Area of a Triangle/TRIGONOMETRY USING THE SHARP EL-9600 45
√
1
2
√