96
Program code Key operations
H=X√Œ+Y√Œ-X…Œ-Y…Œ
; H ; = @ v 2 A
+ @ v 3 A - @ v
d d d d X3 e e A
- @ v d d d d d
Y3 e e A e
I=X≥-X√ ; I ; = @ v 0 -
@ v 2 e
J=X√-X… ; J ; = @ v 2 -
@ v 4 e
K=Y≥-Y√ ; K ; = @ v 1 -
@ v 3 e
M=Y√-Y… ; M ; = @ v 3 -
@ v 5 e
X=(GM-HK)©2(IM-JK)
; X ; = ( ; G ; M -
; H ; K ) z 2 ( ; I
; M - ; J ; K ) e
Print X i 0 ; X e
Wait i 3 e
Y=(GJ-HI)©2(KJ-MI)
; Y ; = ( ; G ; J -
; H ; I ) z 2 ( ; K
; J - ; M ; I ) e
Print Y i 0 ; Y e
Wait i 3 e
R=‰((X-X≥)Œ+(Y-Y≥)Œ)
; R ; = @ * ( ( ; X
- @ v 0 ) A + ( ;
Y - @ v 1 ) A ) e
Print R i 0 ; R e
Example
Obtain the center coordinates (X, Y) and radius R of the circle that passes
through points P(1, 9), Q (7, 1) and S (0, 2).
4. Press j to return to the PROG mode menu.
5. Press 0, select the program ‘CIRCLE’ and press e.
6. Enter the coordinates (X1 to X3, Y1 to Y3) for the three points.
Result
The center is (4, 5) and radius is 5.
Chapter 8: Application Examples
*Perform equation 1.
* Perform equation 2.
* Perform equation 3.
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