**tangents to a circle, from an exterior point**

**tangents common to two equal circles**

**tangents common to two different circles**

**interior tangents common to two different circles**

**ellipse, given its axes #01**

**ellipse, given its axes #02**

**tangent and normal to the ellipse**

**foci of a given ellipse**

**tangents to an ellipse, from an exterior point**

**tangent to an ellipse, given its direction**

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