Transforming from one set of rectangular axes to another with the same origin, but different direction.

A circle in its common, or central form. This is used to assist students in finding the equation of…

Finding the perpendicular distance of points whose equation is x cosa + y sina = p.

Tangent lines are drawn from a given external point to a circle. The equation is found by joining their…

A circle with part of a triangle inscribed in it. They are lying on a coordinate plane.

Any system of coordinate axes to another set which is parallel to the former, but with different origins.