Mutual tangent lines
121084
Right triangles and tangent lines
67287
Visible seams on tangent normal maps
52316
Geodesics and Curves on a Plane
152442
An annulus in $\mathbb R^2$ is path connected
136168
Tangent planes to $2+x^2+y^2$ and that contains the $x$ axis
89567
Common tangent to a curve
23414
Topologist's Sine Curve: A rigorous proof of why $\overline{S} = S \cup V$
24222
Sum of the squares of the reciprocals of the fixed points of the tangent function
148173
Find a tangent to two quadratic bezier curves
39159
Finding unit tangent, normal, and binormal vectors for a given r(t)
86640
Equation of a line that is tangent to a curve at point
83230
A useful illustration for differential geometry
61628
Does every smooth local frame of the tangent bundle correspond to a chart?
37448
Two Circles and Tangents from Their Centers Problem
131621
Evaluating a product of tangents
26586
Lofting between two different shapes along a path
49845
For an ellipse with minor radius $b$, show that the product of distances from the foci to any tangent line is $b^2$