1. Question 214
    Coordinate Geometry - Circles - Geometry - Investigate Equation of Circle: \({\left( {x - a} \right)^2} + {\left( {y - b} \right)^2} = {r^2}\)
  2. Question 4006
    was: Coordinate Geometry - Circles - Geometry - Equation of a circle 2
    now: Coordinate Geometry - Circles - Geometry - Matching Circles
  3. Question 1684
    was: Coordinate Geometry - Tangents and normals - The parabola
    now: Coordinate Geometry - Tangents and normals - Investigate Equation of Parabola
  4. Question 1686
    was: Coordinate Geometry - Tangents and normals - The ellipse
    now: Coordinate Geometry - Tangents and normals - Investigate Equation of Ellipse
  5. Question 1688
    was: Coordinate Geometry - Tangents and normals - The hyperbola
    now: Coordinate Geometry - Tangents and normals - Investigate Equation of Hyperbola
  6. Question 1690
    was: Coordinate Geometry - Tangents and normals - The rectangular hyperbola
    now: Coordinate Geometry - Tangents and normals - Investigate Equation of Rectangular Hyperbola
  7. Question 1177
    was: Coordinate Geometry - Tangents and normals - The circle
    now: retired
  8. Question 1653
    was: Coordinate Geometry - Conics - The circle
    now: merge with Question 214
  9. Question 1652
    was: Coordinate Geometry - Conics - The family of conics
    now: Coordinate Geometry - Conics - Family of Conics using Polar Equations
  10. Question 1176
    was: Coordinate Geometry - Tangents and normals - The parabola
    now: Coordinate Geometry - Tangents and normals - The parabola
  11. Question 1202
    was: Coordinate Geometry - Tangents and normals - The ellipse
    now: Coordinate Geometry - Tangents and normals - The ellipse
  12. Question 1204
    was: Coordinate Geometry - Tangents and normals - The hyperbola
    now: Coordinate Geometry - Tangents and normals - The hyperbola
  13. Question 1203
    was: Coordinate Geometry - Tangents and normals - Other curves
    now: Coordinate Geometry - Tangents and normals - Other curves
  14. Question 1178
    Coordinate Geometry - Tangents and normals - Investigate the Rectangular Hyperbola: \(xy = {c^2}\) or \(\left( {ct,{c \over t}} \right)\)
  15. Question 1654
    was: Coordinate Geometry - Conics - The parabola
    now: Coordinate Geometry - Conics - The parabola
  16. Question 1655
    was: Coordinate Geometry - Conics - The ellipse
    now: Coordinate Geometry - Conics - The ellipse
  17. Question 1656
    was: Coordinate Geometry - Conics - The hyperbola
    now: Coordinate Geometry - Conics - The hyperbola
  18. Question 1657
    was: Coordinate Geometry - Conics - Rectangular hyperbola
    now: Coordinate Geometry - Conics - Rectangular hyperbola
  19. Question 1181
    was: Coordinate geometry - Parametric curves - Various curves
    now: Coordinate geometry - Parametric curves - Various curves
  20. Question 1182
    was: Coordinate geometry - Parametric curves - Various curves 2
    now: Coordinate geometry - Parametric curves - Various curves 2
  21. Question 1183
    was: Coordinate geometry - Parametric curves - Various curves 3
    now: Coordinate geometry - Parametric curves - Various curves 3
  22. Question 1184
    was: Coordinate geometry - Parametric curves - Various curves 4
    now: Coordinate geometry - Parametric curves - Various curves 4
  23. Question 1666
    was: Coordinate geometry - Parametric curves - The parabola
    now: Coordinate geometry - Parametric curves - The parabola
  24. Question 1668
    was: Coordinate geometry - Parametric curves - The ellipse
    now: Coordinate geometry - Parametric curves - The ellipse
  25. Question 1669
    was: Coordinate geometry - Parametric curves - The hyperbola
    now: Coordinate geometry - Parametric curves - The hyperbola
  26. Question 1670
    was: Coordinate geometry - Parametric curves - The rectangular hyperbola
    now: Coordinate geometry - Parametric curves - The rectangular hyperbola
  27. Question 1671
    was: Coordinate geometry - Parametric curves - Cycloids
    now: Coordinate geometry - Parametric curves - Cycloids
  28. Question 1672
    was: Coordinate geometry - Parametric curves - More cycloids
    now: Coordinate geometry - Parametric curves - More cycloids