中点直线方程

GeoGebra 命令及参数

1. Polygon({A, A + (12 * u), A + (12 * u) - vHeight, A - vHeight}) → ValueFrameTemplate
2. Length(dTypes) → numSteps
3. Sequence((-10, -18) + ((3.5 * i) * u), i, 0, 6) → iconAnchors
4. Sequence(Translate[ValueFrameTemplate, Vector[(-((vHeight * i)))]], i, 0, numSteps - 1) → ValueFrames
5. Sequence(Polygon[Element[iconAnchors, i], Element[iconAnchors, i + 1], 4], i, 1, 6, 2) → iconFrames
6. Polygon({(left, bottom), (left, top), (right, top), (right, bottom)}) → viewbox
7. Element(G3, caseNum) → A3
8. Element(G4, caseNum) → A4
9. Element(G5, caseNum) → A5
10. Polygon({ToolAnchor - (2 * v) - u, ToolAnchor + (4.5 * v) - u, ToolAnchor + (4.5 * v) + (20 * u), ToolAnchor - (2 * v) + (20 * u)}) → toolBar
11. UnitVector(Vector[A3, A4]) → uAB
12. UnitVector(Vector[A3, A5]) → uAC
13. UnitVector(Vector[A4, A5]) → uBC
14. LaTeX((((("\text{\textbf{Question: }" * QUESTION) * "\\\textbf{Instructions: }") * INSTRUCTIONS) * "}")) → allInstruc
15. Segment(A4, A5) → segBC
16. Element(iconFrames, currentAction) → iconHighlighter
17. Point(studentAnswer) → lblStudentLine
18. Element(ValueFrames, 1) → vFrame1
19. Element(ValueFrames, 2) → vFrame2
20. Element(ValueFrames, 3) → vFrame3
21. Element(ValueFrames, 4) → vFrame4
22. Element(ValueFrames, 5) → vFrame5
23. Element(ValueFrames, 6) → vFrame6
24. Element(ValueFrames, 7) → vFrame7
25. Zip(Element[ValueFrames, A], A, selectedList) → highlightedItems
26. TableText({dDisplay}, "vc") → valueTbl
27. Line(A3, Midpoint[A4, A5]) → lineA
28. UnitVector(Vector[A3, Midpoint[A4, A5]]) → uAE
29. TableText({Join[{{"\phantom{find the equation of a line through (-1,-3) with slope -5}"}, dSteps}]}, "vr") → stepsTable
30. Line(A3, Midpoint[A4, A5]) → answerLine
31. LineToSlopeForm1(answerLine) → test
32. LineToSlopeForm1(answerLine) → answerString
33. Segment((-10, 13.174886697253502), (-7, 13.174886697253502)) → legendLineK