坐标中的勾股定理

GeoGebra 命令及参数

1. If(y(A) < 0, ")", "") → brY_AR
2. If(y(A) < 0, "(", "") → brY_AL
3. If(x(A) < 0, ")", "") → brX_AR
4. If(x(A) < 0, "(", "") → brX_AL
5. If(c / d < 0, "-", "") → sign
6. GCD(c, d) → HCF
7. If(c > 0 ∧ d > 0 ∧ HCF < 2 ∧ d ≠ 1, "", If[den ≟ 0, "= undefined", If[den ≠ 1, "=" + sign + "\frac{" + num + "}{" + den + "}", "=" + sign + num]]) → text11
8. Segment(A, B) → a
9. Slope(a) → b
10. OrthogonalLine(A, line) → g
11. OrthogonalLine(B, g) → h
12. Intersect(g, h) → C
13. Intersect(line, g) → D
14. Intersect(g, h) → E
15. Intersect(h, a) → F
16. Intersect(line, g) → G
17. Polygon(A, C, B) → poly1, a_1, b_1, c_1
18. Midpoint(A, C) → H
19. Midpoint(B, C) → I