Equality of two chords formed by intersections of circle with tangent lines to another circle
37448
Two Circles and Tangents from Their Centers Problem
71229
Intersection of two parabolae
131621
Evaluating a product of tangents
131919
Vertices of equilateral triangle inscribed in the unit circle
33100
Trigonomnetric equality involving tg
132759
Area of intersection between two circles
115737
Tangent and Normal lines that pass through the origin
143525
line segment joining two centers of circles is perpendicular to line segment joining two intersection point of the circles
128721
Finding the equation of an ellipse tangent to two lines
144901
Tangent to a circle through a point
81777
Sum of radii of intersecting circles internally tangent to another circle
158727
Leg bisectors in a trapezoid and angle equality
62126
Constructing a triangle given 2 sides and the inscribed circle's radius
37407
Area of intersection of two Annulus
93252
Prove that the common chord passes through the origin.
32090
Equal intersection segments on circles
134722
Intersection of straight line and circle