斜率演示

GeoGebra 命令及参数

1. PointIn(x ≥ x(A)) → B
2. Line(A, B) → f
3. Point(Segment[A, B]) → C
4. If(y(B) ≥ y(A), (x(B), y(A)), (x(A), y(B))) → D
5. Polygon(A, D, B) → t1, b, a, d
6. Vector(A, D) → u
7. Vector(D, B) → v
8. If(y(B) ≥ y(A), Midpoint[D, B], Midpoint[A, D]) → E
9. If(y(B) ≥ y(A), Midpoint[A, D], Midpoint[D, B]) → F
10. Slope(Line[A, B]) → h
11. Numerator(h) → i
12. Denominator(h) → j
13. If(y(B) ≥ y(A), C + (j, 0), C + (0, i)) → G
14. If(y(B) ≥ y(A), G + (0, i), G + (j, 0)) → H
15. Polygon(C, G, H) → t2, h_1, c_1, g_1
16. Vector(C, G) → w
17. Vector(G, H) → k
18. If(y(B) ≥ y(A), Midpoint[C, G], Midpoint[G, H]) → I
19. If(y(B) ≥ y(A), Midpoint[G, H], Midpoint[G, C]) → J
20. RotateText(text1, atand(Slope[f])) → text2
21. RotateText(text5, atand(Slope[f])) → text3