解线性方程组的几何方法

GeoGebra 命令及参数

1. Point({userPOIx, userPOIy}) → userPOI
2. Element(questionList, questionListIndex) → questionNum
3. Element(C2:C5, questionNum) → poi
4. Polygon({(-11, -11), (-11, 11), (11, 11), (11, -11)}) → viewBox
5. LaTeX((((("\text{" * QUESTION) * "\\") * INSTRUCTIONS) * "}")) → TEXT
6. DynamicCoordinates(free1A, If[IsInRegion[free1A, viewBox], x(free1A), 18.5], If[IsInRegion[free1A, viewBox], y(free1A), 7.25]) → line1A
7. DynamicCoordinates(free2A, If[IsInRegion[free2A, viewBox], x(free2A), 18.5], If[IsInRegion[free2A, viewBox], y(free2A), 1.25]) → line2A
8. DynamicCoordinates(free2B, If[IsInRegion[free2B, viewBox], x(free2B), 20.5], If[IsInRegion[free2B, viewBox], y(free2B), 1.25]) → line2B
9. DynamicCoordinates(free1B, If[IsInRegion[free1B, viewBox], x(free1B), 20.5], If[IsInRegion[free1B, viewBox], y(free1B), 7.25]) → line1B
10. Line(line1A, line1B) → userLine1
11. Line(line2A, line2B) → userLine2
12. Intersect(A2, B2) → C2
13. Intersect(A3, B3) → C3
14. Intersect(A4, B4) → C4
15. Intersect(A5, B5) → C5
16. Element(A2:A5, questionNum) → line1
17. Element(B2:B5, questionNum) → line2
18. LaTeX(("\text{Line 1: }" * line1)) → labelLine1
19. LaTeX(("\text{Line 2: }" * line2)) → labelLine2
20. LaTeX("\text{Points: }") → pointsLine1
21. LaTeX("\text{Points: }") → pointsLine2
22. Textfield(textPOIx) → ansBoxX
23. Textfield(textPOIy) → ansBoxY
24. LaTeX("\begin{tabular}{c}\text{The solution is}\\(\hspace{45},\hspace{45})\end{tabular}") → solution
25. LaTeX(activePoint) → activePointLabel
26. LaTeX(poi) → poiLabel
27. LaTeX("\text{Line 1}") → line1LabelOnGrid
28. LaTeX("\text{Line 2}") → line2LabelOnGrid