Two parabolas, perpendicular axes: Can we prove the intersection points are concyclic?
71229
Intersection of two parabolae
44349
A geometric reason why the square of the focal length of a hyperbola is equal to the sum of the squares of the axes?
126758
How do I show intersecting points of three functions in 3D?
158727
Leg bisectors in a trapezoid and angle equality
56320
Prove that the circumradius of $\triangle PAB$ is constant
111930
Domain of a Standard Parabola
4343
Conformal parametrization of an ellipse
63742
A key doubt about the resultant of two polynomials and their common zero locus
142862
Intersection of an ellipsoid and plane in parametric form
236
Proof of general Euclid's Lemma in a UFD (by Euclidean algorithm?)
101249
If $J$ is tangent point of $GH$ with incircle of $FGH$ and $D$ is intersection of $F$-mixtilinear inclrcle with $(FGH)$, then $\angle FGH=\angle GDJ$.
117618
How to geometrically prove the focal property of ellipse?
20652
Show that the families of hyberbolae $x^2-y^2=a$, $xy=b$ create an orthogonal grid: what am I doing wrong?
34029
Find intersection of pairs of straight lines
73796
Coordinates of intersections in axis environment (pgfplots)
140519
How to determine the point of intersection of two lines?
126584
Intersection of two splines