矩形、三角形、梯形和扇形的面积

GeoGebra 命令及参数

1. Random(14, 22) → l
2. Random(0, 20) → e
3. Random(-2, 8) → d
4. Random(8, 13) → c
5. Random(0, 5) → b
6. Random(0, 5) → a
7. Segment(A, B) → f
8. Line(D, f) → p
9. OrthogonalLine(B, p) → s
10. Intersect(p, s) → G
11. OrthogonalLine(A, p) → r
12. Intersect(p, r) → E
13. Circle(E, G) → q
14. Point(q) → secpoint1
15. Midpoint(A, B) → C
16. Polygon(A, D, B) → poly1, b_1, a_1, d_1
17. OrthogonalLine(D, f) → g
18. Line(A, B) → h
19. OrthogonalLine(D, h) → i
20. Intersect(h, i) → F
21. Segment(D, F) → j
22. Segment(A, F) → k
23. PointIn(poly1) → Pointpoly1
24. Textfield(area) → InputBox1
25. Random(1, 14) → A16
26. Cell(2, A16) → B16
27. Polygon(A, E, G, B) → poly2, a_2, e_1, g_1, b_2
28. PointIn(poly2) → Pointpoly2_1
29. PointIn(poly2) → Pointpoly2
30. Textfield(v) → InputBox2
31. Distance(E, G) → w
32. Vector(E, G) → u_1
33. PointIn(q) → Pointq
34. Segment(secpoint1, E) → leg1
35. Rotate(secpoint1, randomangle, E) → secpoint2
36. Segment(secpoint2, E) → leg2
37. CircleArc(E, secpoint1, secpoint2) → sectorarc
38. Angle(secpoint1, E, secpoint2) → sectoranglelabel
39. Segment(TrapA, TrapB) → Trapbase
40. Segment(TrapC, TrapB) → Trapright
41. Line(TrapC, Trapbase) → Traptopparallel
42. Segment(TrapD, TrapA) → Trapleft
43. Segment(TrapD, TrapC) → traptop
44. Midpoint(TrapA, TrapB) → trapbasemidpoint
45. Distance(trapbasemidpoint, traptop) → distancetrapbasemidpointtraptop
46. OrthogonalLine(trapbasemidpoint, Trapbase) → i_1
47. Intersect(traptop, i_1) → traptopmidpoint
48. Segment(traptopmidpoint, trapbasemidpoint) → trapperpendicularheightline
49. Polygon(TrapA, TrapB, TrapC, TrapD) → poly3, trapa, trapb, trapc, trapd
50. Line(G, E) → j_1
51. Intersect(q, j_1) → H, I
52. Segment(I, G) → diameter