相似三角形AA判定互动练习（MT3-02-P2a-XT1）

GeoGebra 命令及参数

1. Rotate(D, α, A) → D'
2. Polygon(BLviewBox, (x(BLviewBox), y(TRviewBox)), TRviewBox, (x(TRviewBox), y(BLviewBox))) → viewBox, vbLeft, vbTop, vbRight, vbBottom
3. IntersectPath(Ray[A, D'], viewBox) → BPath_1
4. UnicodeToLetter(10007) → xmark
5. UnicodeToLetter(10003) → cmark
6. Line(B, C) → f
7. Point(BPath_1) → B'
8. Line(B', f) → g
9. Intersect(Ray[A, D], g) → C''
10. Polygon(A, B, C) → tABC, c, a, b
11. Point(Segment[A, (x(TRviewBox), y(A))]) → C'
12. Line(C', f) → h
13. Intersect(h, Ray[A, D']) → B''
14. Polygon(A, B'', C') → tSimilarC, tSimilarC_c, tSimilarC_a, tSimilarC_b
15. Polygon(A, B', C'') → tSimilarB, tSimilarB_c, tSimilarB_a, tSimilarB_b
16. Point(Segment[A, Intersect[Ray[A, B], viewBox]]) → Bfree
17. Point(Segment[A, (x(TRviewBox), y(A))]) → Cfree
18. Polygon(A, Bfree, Cfree) → tFree, tFree_c, tFree_a, tFree_b
19. LaTeX(If[bActive, "\(C'\)", "\(B'\)"]) → inactivePoint
20. If(¬displaySimilar, Bfree, If[bActive, B', B'']) → BlblPos
21. If(¬displaySimilar, Cfree, If[bActive, C'', C']) → ClblPos
22. Angle(A, B, C) → angleABC
23. Angle(B, C, A) → angleBCA
24. Angle(C, A, B) → angleCAB
25. Angle(A, B', C'') → angleAB'C'_b
26. Angle(A, B'', C') → angleAB'C'_C
27. Angle(B', C'', A) → angleB'C'A_B
28. Angle(B'', C', A) → angleB'C'A_C