The second foci of the ellipsis of Earth around Sun
17126
Significance of the second focus in elliptical orbits
90246
Area of an ellipse. (Calculus)
69115
Imaginary line on the Earth is straight or not?
157968
The projection of an ellipse is still an ellipse
71074
The locus of the intersection point of two perpendicular tangents to a given ellipse
96691
Distance of point $P$ from an ellipse
19900
Calculating equidistant points around an ellipse arc
24730
A circle has the same center as an ellipse and passes through the foci $F_1$ and $F_2$ of the ellipse, two curves intersect in $4$ points.
89194
Potential at Center of Earth
67591
The International Date Line wrap around
92892
Formula for Nicolosi Globular Projection
12014
Solving a multi-variable trig sum to find the max separation btwn 2 ellipses
35571
Euler Rotations in Ordinary Space
4704
How to find an ellipse , given 2 passing points and the tangents at them?
148963
The Ellipse Problem - finding an ellipse inside a triangle
13954
Calculating the length of the semi-major axis from the general equation of an ellipse
118723
Finding the tangents common to two rotated ellipses?