- tangents
- tangent lines to a circle
- the relative position of two circles
- the reflective property of ellipse
- the reflective property of parabola
- the reflective property of hyperbola
- tangent at a point
- tangent-chord angle
- function - tangent - derivatives
- radical axis-1
- radical axis-2
- f(x)=e^x/x
- gergonne point
- chords and tangents
- the common tangent of two parabolas
- parallel tangents of an ellipse
- tangents to a circle
- equal chords-1
- reflective properties of conic sections
- tangent-secant theorem
- the mean value theorem
- exeter point
- tangent-chord angle-1
- tangent to a circle
- common external tangents
- common internal tangents
- common external tangents-1
- common internal tangents-1
- tangent and derivative
