| 106045 | Rotation of Axes · Exercise 62 | Medium | OpenStax | |
| 106047 | Rotation of Axes · Exercise 64 | Medium | OpenStax | |
| 106078 | Conic Sections in Polar Coordinates · Exercise 19 | Medium | OpenStax | |
| 106080 | Conic Sections in Polar Coordinates · Exercise 21 | Medium | OpenStax | |
| 106082 | Conic Sections in Polar Coordinates · Exercise 23 | Medium | OpenStax | |
| 106084 | Conic Sections in Polar Coordinates · Exercise 25 | Medium | OpenStax | |
| 106086 | Conic Sections in Polar Coordinates · Exercise 27 | Medium | OpenStax | |
| 106088 | Conic Sections in Polar Coordinates · Exercise 29 | Medium | OpenStax | |
| 106102 | Conic Sections in Polar Coordinates · Exercise 43 | Medium | OpenStax | |
| 106104 | Conic Sections in Polar Coordinates · Exercise 45 | Medium | OpenStax | |
| 106106 | Conic Sections in Polar Coordinates · Exercise 47 | Medium | OpenStax | |
| 106107 | Conic Sections in Polar Coordinates · Exercise 49 | Medium | OpenStax | |
| 106109 | Conic Sections in Polar Coordinates · Exercise 51 | Medium | OpenStax | |
| 106111 | Conic Sections in Polar Coordinates · Exercise 53 | Medium | OpenStax | |
| 106113 | Conic Sections in Polar Coordinates · Exercise 55 | Medium | OpenStax | |
| 106127 | Conic Sections in Polar Coordinates · Review Exercise 69 | Medium | OpenStax | |
| 106129 | Conic Sections in Polar Coordinates · Review Exercise 71 | Medium | OpenStax | |
| 106151 | Conic Sections in Polar Coordinates · Review Exercise 93 | Medium | OpenStax | |
| 106153 | Conic Sections in Polar Coordinates · Review Exercise 95 | Medium | OpenStax | |
| 106167 | Conic Sections in Polar Coordinates · Review Exercise 109 | Medium | OpenStax | |
| 106185 | Conic Sections in Polar Coordinates · Exercise 127 | Medium | OpenStax | |
| 106187 | Conic Sections in Polar Coordinates · Exercise 129 | Medium | OpenStax | |
| 132898 | Decide between circle-ellipse-parabola-hyperbola, based on the … equation with … and | Medium | Strang | |
| 132900 | … is above the focus on the ellipse | Medium | Strang | |
| 132904 | The ellipse … is really a \_\_\_\_\_\_ with center at \_\_\_\_\_\_ and… | Medium | Strang | |
| 132906 | Rotate the axes of … by using equation (7) with | Medium | Strang | |
| 105752 | The Ellipse · Exercise 13 | Medium | OpenStax | |
| 105754 | The Ellipse · Exercise 15 | Medium | OpenStax | |
| 105756 | The Ellipse · Exercise 17 | Medium | OpenStax | |
| 105758 | The Ellipse · Exercise 19 | Medium | OpenStax | |
| 105760 | The Ellipse · Exercise 21 | Medium | OpenStax | |
| 105762 | The Ellipse · Exercise 23 | Medium | OpenStax | |
| 105764 | The Ellipse · Exercise 25 | Medium | OpenStax | |
| 105766 | The Ellipse · Exercise 27 | Medium | OpenStax | |
| 105768 | The Ellipse · Exercise 29 | Medium | OpenStax | |
| 105770 | The Ellipse · Exercise 31 | Medium | OpenStax | |
| 105772 | The Ellipse · Exercise 33 | Medium | OpenStax | |
| 105774 | The Ellipse · Exercise 35 | Medium | OpenStax | |
| 105776 | The Ellipse · Exercise 37 | Medium | OpenStax | |
| 105778 | The Ellipse · Exercise 39 | Medium | OpenStax | |
| 105779 | The Ellipse · Exercise 40 | Medium | OpenStax | |
| 105780 | The Ellipse · Exercise 41 | Medium | OpenStax | |
| 105781 | The Ellipse · Exercise 42 | Medium | OpenStax | |
| 105782 | The Ellipse · Exercise 43 | Medium | OpenStax | |
| 105783 | The Ellipse · Exercise 44 | Medium | OpenStax | |
| 105784 | The Ellipse · Exercise 45 | Medium | OpenStax | |
| 105785 | The Ellipse · Exercise 46 | Medium | OpenStax | |
| 105786 | The Ellipse · Exercise 47 | Medium | OpenStax | |
| 105787 | The Ellipse · Exercise 48 | Medium | OpenStax | |
| 105788 | The Ellipse · Exercise 49 | Medium | OpenStax | |